Wheels
Keystone Castors & Wheels stocks the widest range of castor wheels suitable for most castor and industrial applications. We have been Castor & Wheel specialists since 1926. Whether you're looking for a replacement caster wheel or a bulk purchase of industrial wheels we have the knowledge, experience and stock availability to assis...t you in making the best choice.Browse Keystone wheels online for a Industrial wheel suitable for Material Handling Trolleys , Industrial carts, Sack Trucks , Pneumatic Wheel applications, V Groove Rail wheels, Flange Rail wheels, Machine Wheels and Drive Wheels or call one our our experienced Technical Sales team for help you make your selection.
Because we carry vast stock of caster and trolley wheels we can handle large orders and small orders from both domestic and business customers. Our UK Castor & Wheel stocks include many models. Including nylon, rubber tyre, polyurethane, cast iron, polypropylene tyre , pneumatic (inflatable), puncture proof wheels (flat free wheels). All these castor wheels can have various options for bearings: Roller, Ball or Plain Bearings.
About Caster Wheel Bearings
The type of bearing used in a castor wheel affects the running properties of it and therefore the mobility of the unit they are fitted to:
Plain Bore Bearings (Plain Bore)
This is the most economical type of bearing. In fact, there isn't one. The wheel turns around an axle tube. They are great if the equipment they are attached to does not have to move much and when it does without a great deal of weight on it. Under normal circumstances, they are maintenance free and corrosion resistant.
Revvo PT Designer industrial wheels are available with a keyway.
Roller Bearings
This type has a series of steel rollers within a cage. The rollers rotate between the axle tube and the wheel hub. Using these bearings means that the rolling resistance of the bearing is very small, even under heavy load. This type of bearing is the most commonly used especially for transportation equipment. They are robust and generally maintenance free. Please note, in stainless steel castors the rollers are stainless steel and in high temperature wheels, the cage is made from steel.
Ball Bearings
Castor wheel ball bearings consist of a stamped sheet metal housing enclosing an inner and outer ring. The ball bearings run between these two rings. This type of bearing has excellent running properties even under very heavy loads and at high speeds. Because the bearings are sealed, these bearings do not need to be lubricated. This is the engineers choice for apparatus castors and heavy duty casters in most applications. Read More
- Display 45 Products per page
In StockCastor Wheel 150mm | Polyurethane Tyre / Cast Iron Centre, 650kg, 20mm Ball bearing (AW150PCB)
£58.43150mm Caster Wheel with a Yellow Polyurethane Tyre... Read More (91 Shore A) on a Cast Iron Centre. It has two quality 20mm Shielded Ball bearings, a 60mm hub length and a Load Capacity of 650kg.This castor wheel has a high load rating for heavy duty applications yet gentle on concrete flooring. The polyurethane used on this wheel has a low rolling resistance, excellent elasticity and is resistant to compression and abrasions.- Out of Stock - On the Way
Castor Wheel 150mm | Polyurethane Tyre / Cast Iron Centre, 650kg, 20mm Ball bearing (AW150PCB50)
£41.81150mm Caster Wheel with a Yellow Polyurethane Tyre... Read More (91 Shore A) on a Cast Iron Centre. It has two quality 20mm Shielded Ball bearings, a 50mm hub length and a Load Capacity of 650kg.This castor wheel has a high load rating for heavy duty applications yet gentle on concrete flooring. The polyurethane used on this wheel has a low rolling resistance, excellent elasticity and is resistant to compression and abrasions. - In Stock
Castor Wheel 150mm | Polyurethane Tyre / Cast Iron Centre, 700kg, 20mm Ball Bearing (15020241)
£41.46150mm Polyurethane Tyre on a Cast Iron Centre Cast... Read Moreor Wheel with 20mm Ball Bearings, 50mm Tread Width and 60mm Hub Length (the distance through the bore). Load Capacity = 700kgThe polyurethane used as the tyre is a high quality polyurethane that has a high tear strength, exceptional abrasion resistance and a useful life of up to 10 times that of equivalent rubber tyres under similar conditions and loads. - In Stock
Castor Wheel 150mm | Polyurethane Tyre / Cast Iron Centre, 725kg, 20mm Roller Bearing (WSU6RBM20)
£63.99150mm Polyurethane Tyre on a Cast Iron Centre W... Read Moreheel with a 20mm Roller Bearing (Flexello). Load Capacity = 725kg
The Polyurethane tyre offers a low tractive resistance making it easier to get moving compared with softer rubber tread wheels. It is also a bit softer than hard tread wheels making it smoother and quieter running. The polyurethane tyre is also non-marking and gentle on floors while the roller bearing lowers the rolling resistance to reduce the effort required start the wheel rolling.
- In Stock
Castor Wheel 150mm | Polyurethane Tyre / Cast Iron Centre, 730kg, 20mm Ball Bearing (150PT2H)
£89.37150mm Castor Wheel with a Polyurethane Tyre (Revvo... Read Morethane) on a Cast Iron Centre and 20mm Ball Bearings. Load Capacity = 730kg using manual propulsion @ 4km/h.Key Specifications:- Hub Length: 57mm
- Tread Width: 38mm
- Bearing Type: Ball Bearings
- Tyre Hardness: 93 Shore A
- Wear Resistance: Has a life of up to 10 times that of natural rubber under similar conditions and load
- High Load Capacity: Up to 3 times the loading of an equivalent rubber tyre wheel.
- Low Rolling Resistance
- Floor Protection: Shock absorbing, quiet running and will not harm sound floors
- Resistant to Chemicals and Oils: Resistant to a wide range of commonly encountered chemicals and oils such as Mineral Oil, Greases, Hydraulic Fluid, Aliphatic solvents, Petrol, Diesel and cutting oils.
- In Stock
Castor Wheel 150mm | Polyurethane Tyre / Cast Iron Centre, 730kg, 20mm Roller Bearing (150PT15)
£62.74150mm Polyurethane Tyre on a Cast Iron Centre Whee... Read Morel (Revvo) with a 20mm Roller Bearing, 38mm Tread Width, 60mm Hub (the distance through the central bore) and a 92-97 shore A hardness. This castor wheel's Load Capacity is 730kg using manual propulsion and 4 km/h.Polyurethane tyres have a very high tear and abrasion resistance providing up to 10 times the life of natural rubber when used under similar conditions and loads. Furthermore, they have approximately 30% less rolling resistance compared with comparable rubber tyre wheels making them easier to move. - In Stock
Castor Wheel 150mm | Polyurethane Tyre / Nylon Centre, 400kg, 20mm Ball bearing (AW150PNBJ)
£20.09150mm Red Polyurethane Tyre on a Nylon Centre ... Read MoreWheel with a 40mm Tread Width and 60mm hub length (the distance through the central bore). The castor wheel is fitted with 20mm Ball bearings to enable smooth and easy operation.
The wheel is very strong with a load capacity of 400kg at 4km/h (walking speed) using manual propulsion, making it suitable for most industrial and domestic applications.
- Out of Stock - On the Way
Castor Wheel 150mm | Polyurethane Tyre / Nylon Centre, 600kg, 20mm Plain Bore (WPN6M20)
£19.92150mm Red Polyurethane Tyre on a Grey Nylon Centre... Read More Caster Wheel (Flexello Brand) with 45mm Tread width, 60mm Hub length, 20mm Smooth Plain Bore and a Load Capacity of 600kg - In Stock
Castor Wheel 150mm | Rubber Tyre / Cast Iron Centre, 400kg, 20mm Plain Bore (WRT6M20)
£28.53150mm Black rubber tyre on a black painted cast ir... Read Moreon centre castor wheel with 45mm tread width, 60mm hub length and 20mm smooth plain pore. Load Capacity = 400kg - In Stock
Castor Wheel 150mm | Rubber Tyre / Cast Iron, 370kg, 20mm Roller Bearing (150RU15)
£37.61150mm Rubber Tyre /... Read More Cast Iron Centre Wheel with 20mm Roller Bearing. Load Capacity = 370kg - In Stock
Castor Wheel 150mm | Rubber Tyre / Cast Iron, 400kg, 20mm Ball Bearing (15020341)
£31.29150mm Castor Wheel with Black Rubber Tyre on a Cas... Read Moret Iron. This wheel has 20mm Ball Bearings and a load capacity of 400kg using manual propulsion at 4km/h. - In Stock
Castor Wheel 160mm | Black Elastic Rubber Tyre / Aluminium Centre, 300kg, 20mm Ball bearing (AW160EAB)
£19.60160mm Black Rubber Tyred Wheel on Aluminium Centre... Read More (Wheel - Resilient Tread) with 20mm Ball bearing. Load Capacity = 300kg - In Stock
Castor Wheel 160mm | Black Rubber Tyre / Pressed Steel Centre, 150kg, 20mm Roller Bearing (KW160RMB)
£9.72160mm Black Rubber Tyre on a Pressed Steel Centre ... Read Morewheel with 20mm Roller Bearing, 48mm Tread width and 60mm Hub length (the distance through the central Bore. Load Capacity = 150kg.Roller Bearings consist of steel rollers in a plastic housing the rotate between the Axle and the wheel's hub (the central bore). Not only do they greatly reduces the wheel's rolling resistance even when under load but they are largely maintenance free and robust. - In Stock
Castor Wheel 160mm | Blue Rubber Tyre / Nylon Centre, 350kg, 20mm Ball bearing (AW160RNBJBLUE)
£26.54160mm Blue Elastic Rubber Tyre wheel on a Nylon... Read More Centre Wheel with 20mm Ball Bearing. The load capacity of this castor wheel is 350kg under manual propulsion at a speed of 4 km/h (walking speed)
The Blue Elastic Rubber offers a higher load capacity over standard grey or black rubber tyres and will not mark floors.
The wheel is fitted with a roller bearing that lowers rolling resistance and is a great choice where you need a softer yet resilient wheel that will not mark or damage floors.
- In Stock
Castor Wheel 160mm | Grey Rubber Tyre / Nylon Centre, 350kg, 20mm Ball bearing (AW160RNBJGREY)
£27.88160mm Grey Elastic Rubber Tyre wheel on a Nylon... Read More Centre Wheel with 20mm Ball Bearing. The load capacity of this castor wheel is 350kg under manual propulsion at a speed of 4 km/h (walking speed)
The Blue Elastic Rubber offers a higher load capacity over standard grey or black rubber tyres and will not mark floors.
The wheel is fitted with a roller bearing that lowers rolling resistance and is a great choice where you need a softer yet resilient wheel that will not mark or damage floors.
- In Stock
Castor Wheel 160mm | Polyurethane Tyre / Aluminium Centre, 600kg, 20mm Ball bearing (AW160PAB)
£32.97160mm Castor Wheel with a Polyurethane Tyre (Shore... Read More A 94) on an Aluminium Centre with 20mm Ball bearings. Load Capacity = 600kg using manual propulsion at 4km/h.Key Specifications:- Tread Width: 50mm
- Hub Length: 60mm (the distance through the central bore)
- Bearing Type: 20mm Ball Bearing
- Tyre Hardness: Shore A 94
- High Load Capacity
- Low Rolling Resistance
- High Wear Resistance
- Low Noise Operation
- In Stock
Castor Wheel 160mm | Polyurethane Tyre / Cast Iron Centre, 850kg, 20mm Ball bearing (KW160PC2B)
£64.78160mm Caster Wheel with a Polyurethane Tyre (94 Sh... Read Moreore A) on a Cast Iron Centre. It has two quality 20mm Shielded Ball bearings, a 60mm hub length and a Load Capacity of 850kg.This castor wheel has a high load rating for heavy duty applications yet gentle on concrete flooring. The polyurethane used on this wheel has a low rolling resistance, excellent elasticity and is resistant to compression and abrasions. - In Stock
Castor Wheel 160mm | Polyurethane Tyre / Cast Iron Centre, 900kg, 20mm Ball Bearing (KW160PCB5020)
£90.04160mm Polyurethane Tyre (92 Shore A) on a Cast Iro... Read Moren Centre Wheel. This castor wheel has a 60mm Hub Length, 50mm Tread Width and 20mm Precision Ball Bearings.Load capacity:- 900kg at 4km/h
- 750kg at 6km/h
- In Stock
Castor Wheel 200mm | Black Elastic Rubber Tyre / Aluminium Centre, 400kg, 20mm Ball bearing (AW200EAB)
£28.16200mm Black Elastic Rubber Tyre on an Aluminium... Read More Centre Wheel with 20mm Ball Bearing. The load capacity of this castor wheel is 400kg under manual propulsion at a speed of 4 km/h (walking speed)
The Elastic Rubber Tyre is a special rubber compound that offers a higher load capacity over standard grey or black rubber tyres and still provides the same floor preserving benefits.
The wheel is fitted with two ball bearing that lowers rolling resistance and is a great choice where you need a softer yet resilient wheel that will damage floors.
- In Stock
Castor Wheel 200mm | Black Rubber Tyre / Pressed Steel Centre, 205kg, 20mm Roller Bearing (KW200RMB)
£11.41200mm Rubber Tyre on a Pressed Steel Centre Wheel ... Read Morewith 20mm Roller Bearing, 50mm Tread Width and 60mm Hub Length (the distance through the central bore). Load Capacity = 205kg - In Stock
Castor Wheel 200mm | Black Rubber Tyre / Pressed Steel Centre, 205kg, 25mm Roller Bearing (AW200RMB25)
£12.83200mm Black Solid Rubber Tyre on a Pressed Steel C... Read Moreentre Wheel with 25mm Roller Bearing, 50mm Tread Width and 58mm Hub length. Load Capacity = 205kg - In Stock
Castor Wheel 200mm | Blue Rubber Tyre / Nylon Centre, 400kg, 20mm Ball bearing (KW200RN2BBLUE)
£27.28200mm Blue Elastic Rubber Tyre wheel on a Nylon Ce... Read Morentre Wheel with 20mm Ball Bearing. The load capacity of this castor wheel is 400kg under manual propulsion at a speed of 4 km/h (walking speed)The Blue Elastic Rubber offers a higher load capacity over standard grey or black rubber tyres and will not mark floors.The wheel is fitted with a roller bearing that lowers rolling resistance and is a great choice where you need a softer yet resilient wheel that will not mark or damage floors. - In Stock
Castor Wheel 200mm | Cast Iron, 1100kg, 20mm Ball bearing (20020441)
£38.10200mm Cast Iron Wheel with 45mm Tread Width, 60mm ... Read MoreHub Length and 20mm Ball Bearing. Load Capacity = 1100kg - In Stock
Castor Wheel 200mm | Cast Iron, 1150kg, 20mm Plain Bore (KW200CI20)
£28.27200mm Cast Iron Castor Wheel with 50mm Tread width... Read More, 60mm Hub Length (distance through the central bore) and a 20mm smooth Plain Bore. Load Capacity = 1150kg - In Stock
Castor Wheel 200mm | Cast Iron, 1270kg, 20mm Plain Bore (WCI8M20)
£36.61200mm Cast Iron Castor Wheel (Flexello) with a smo... Read Moreoth plain bore. The load capacity of this wheel is 1270kg.Key Specifications:- Tread Width: 45mm
- Hub Length: 60mm Hub Length (the distance through the central bore)
- Bore Size: 20mm Plain Bore with a Grease Nipple.
- In Stock
Castor Wheel 200mm | Cast Iron, 1270kg, 20mm Roller Bearing (WCI8RBM20)
£40.46200mm Castor Wheel Cast Iron (Flexello Brand) comp... Read Morelete with grease nipple. This Cast Iron Wheel has a 45mm Tread Width, 60mm Hub Length (the distance through the central bore) and a 20mm Needle Roller Bearing. The Load Capacity is 1270kgCast Iron Wheels are a great choice for many rough service applications because they are strong, shock resistant and have a long working life. They have a very low tractive resistance which aids in the ease of movement and are not susceptible to picking up swarf and other floor debris which may hamper the performance of other Castor Wheel materials. - In Stock
Castor Wheel 200mm | Cast Iron, 910kg, 20mm Ball bearing (KW200CV2H)
Original price was: £66.96.£62.81Current price is: £62.81.Sale!200mm V-Groove (92 Degree) Cast Iron Wheel with 20... Read Moremm Ball Beaing. Load Capacity = 910kg - In Stock
Castor Wheel 200mm | Grey Rubber Tyre / Nylon Centre, 400kg, 20mm Ball bearing (AW200RNBJGREY)
£32.50200mm Grey Elastic Rubber Tyre wheel on a Nylon Ce... Read Morentre Wheel with 20mm Ball Bearing. The load capacity of this castor wheel is 400kg under manual propulsion at a speed of 4 km/h (walking speed)The Grey Elastic Rubber offers a higher load capacity over standard grey or black rubber tyres and will not mark floors.The wheel is fitted with a roller bearing that lowers rolling resistance and is a great choice where you need a softer yet resilient wheel that will not mark or damage floors. - Out of Stock - On the Way
Castor Wheel 200mm | Nylon, 1200kg, 25mm Ball bearing (KW200NYBJ120025)
£63.52200mm Nylon Wheel with 25mm Ball Bearing. Load Capacity = 1200kg - In Stock
Castor Wheel 200mm | Nylon, 1500kg, 25mm Ball Bearing (200NY2H)
£81.53200mm Nylon Wheel with 25mm Ball Bearing, 50mm Tre... Read Moread Width and 60mm Hub Length (the distance through the central bore). The load rating of this castor wheel is 1,500kg - In Stock
Castor Wheel 200mm | Nylon, 550kg, 20mm Roller Bearing (AW200NYB)
£18.42200mm Nylon Castor Wheel with 20mm Roller Beari... Read Moreng, 80mm Tread Width and 58mm Hub Length. This wheel has a load capacity of 550kg.
This is a high quality, low maintenance, impact resistant wheel that has a high load capacity. The nylon material is extremely resistant to salts, greases, acids and alkalis and will not mark or damage concrete floors. This makes Nylon probably the most castor wheel material.
The wheel has a roller bearing in the hub (central part of the wheel) which consists of rollers made of steel within a cage. These rollers rotate between the axle tube and the wheel hub. This makes the rolling resistance of the bearing relatively slight, even under heavy loads. Roller bearings are rugged, robust and largely maintenance-free.
- In Stock
Castor Wheel 200mm | Nylon, 800kg, 20mm Plain bore (AW200NY800)
£24.03200mm White Nylon Wheel with Fluted Centre and 20m... Read Morem Plain Bearing, The hub length (distance through the central bore) is 60mm and the tread width is 57mm. This castor wheel has a Load Capacity of 800kg - In Stock
Castor Wheel 200mm | Nylon, 800kg, 25mm Ball bearing (AW200NYBJ25)
£35.39200mm Nylon Wheel with 25mm Ball Bearing, 57mm Tre... Read Moread width and 59mm Hub Length (the distance through the central Bore) . This castor wheel has a Load Capacity of 800kg - In Stock
Castor Wheel 200mm | Phenolic Resin, 300kg, 20mm Plain Bore (AW200HT)
£50.77200mm Phenolic Resin wheel with 20mm Plain bore. S... Read Moreuitable for High Temperature applications to +280 deg C. Load Capacity = 300kg - In Stock
Castor Wheel 200mm | Pneumatic Tyre / Metal Centre, 75kg, 20mm Roller Bearing (AW200PNB)
£19.80200mm Rib Tread Pneumatic Wheels on a Steel Cen... Read Moretre with 20mm Roller Bearing. The Load Capacity is 75kg at 4km/h (walking speed) using manual propulsion
- *This wheel has a 8 Inch Outside Diameter (including the tyre) sized 200x50 with a 2 ply tyre thickness making it a strong Light-medium duty wheel.
- *Suitable for a 20mm axle shaft
- In Stock
Castor Wheel 200mm | Polyurethane Tyre / Aluminum Centre, 800kg, 20mm Ball bearing (AW200PAB)
£48.06200mm Castor Wheel with a Polyurethane Tyre (Shore... Read More A 94) on an Aluminium Centre with 20mm Ball bearings. Load Capacity = 800kg using manual propulsion at 4km/h.Key Specifications:- Tread Width: 50mm
- Hub Length: 60mm (the distance through the central bore)
- Bearing Type: 20mm Ball Bearing
- Tyre Hardness: Shore A 94
- High Load Capacity
- Low Rolling Resistance
- High Wear Resistance
- Low Noise Operation
- In Stock
Castor Wheel 200mm | Polyurethane Tyre / Cast Iron Centre, 1045kg, 20mm Ball Bearing (WSU8BJM20)
£109.54200mm Red Polyurethane Tyre on a Red Painted Cast ... Read MoreIron Centre, 20mm Ball Bearing, 51mm Tread Width, 60mm Hub Length (the distance through the central bore) and a Load Capacity of 1045Kg - In Stock
Castor Wheel 200mm | Polyurethane Tyre / Cast Iron Centre, 1045kg, 20mm Roller Bearing (WSU8RBM20)
£88.70200mm Polyurethane Tyre on a Cast Iron Centre (... Read MoreFlexello) with a 20mm Roller Bearing. Load Capacity = 1045kg
The Polyurethane tyre offers a low tractive resistance making it easier to get moving compared with softer rubber tread wheels. It is also a bit softer than hard tread wheels making it smoother and quieter running. The polyurethane tyre is also non-marking and gentle on floors while the roller bearing lowers the rolling resistance to reduce the effort required start the wheel rolling.
- In Stock
Castor Wheel 200mm | Polyurethane Tyre / Cast Iron Centre, 1045kg, 25mm Roller Bearing, 25.4mm Bore (WSU8LRB)
£98.53200mm Polyurethane Tyre / Cast Iron Centre Wheel w... Read Moreith 25.4mm (1 Inch) Roller Bearing. Load Capacity = 1045kg - In Stock
Castor Wheel 200mm | Polyurethane Tyre / Cast Iron Centre, 1045kg, 25mm Roller Bearing, 25mm Bore (WSU8RBM25)
£97.82200mm Polyurethane Tyre on a Cast Iron Centre W... Read Moreheel with 25mm Roller Bearing (Flexello). Load Capacity = 1045kg
The Polyurethane tyre offers a low tractive resistance making it easier to get moving compared with softer rubber tread wheels. It is also a bit softer than hard tread wheels making it smoother and quieter running. The polyurethane tyre is also non-marking and gentle on floors while the roller bearing lowers the rolling resistance to reduce the effort required start the wheel rolling.
- In Stock
Castor Wheel 200mm | Polyurethane Tyre / Cast Iron Centre, 1100kg, 20mm Ball Bearing (20020241)
£65.43200mm Polyurethane Tyre on a Cast Iron Centre Cast... Read Moreor Wheel with 20mm Ball Bearings, 50mm Tread Width and 60mm Hub Length (the distance through the bore). Load Capacity = 1100kgThe polyurethane used as the tyre is a high quality polyurethane that has a high tear strength, exceptional abrasion resistance and a useful life of up to 10 times that of equivalent rubber tyres under similar conditions and loads. - In Stock
Castor Wheel 200mm | Polyurethane Tyre / Cast Iron Centre, 1100kg, 20mm Ball bearing (AW200PCB)
£71.98200mm Polyurethane Tyre on a Cast Iron Centre whee... Read Morel with 50mm Tread Width, 60mm Hub Length (distance through the central hole) and 20mm Ball bearings. Load Capacity = 1100kg - In Stock
Castor Wheel 200mm | Polyurethane Tyre / Cast Iron Centre, 1100kg, 20mm Ball bearing (AW200PCB25)
£74.18200mm Polyurethane Tyre on a Cast Iron Centre Whee... Read Morel. This castor wheel has a 200mm Diameter, 50mm Tread Width, 60mm Hub Length, 25mm Ball bearings and a Load Capacity of 1,100kg. - In Stock
Castor Wheel 200mm | Polyurethane Tyre / Cast Iron Centre, 1100kg, 20mm Roller Bearing (200PT15)
£97.83200mm Polyurethane Tyre Wheel on a Cast Iron Centr... Read Moree with a 60mm hub length (the distance through the central bore) and a 20mm Needle Roller Bearing to reduce the rolling resistance. The polyurethane has a shore hardness of 92 - 97 shore A and the Load Capacity of this castor wheel is 1100Kg at 4km/h (walking speed) using manual propulsion.Polyurethane tyres have a very high tear and abrasion resistance providing up to 10 times the life of natural rubber when used under similar conditions and loads. Furthermore, they have approximately 30% less rolling resistance compared with comparable rubber tyre wheels making them easier to move. - In Stock
Castor Wheel 200mm | Polyurethane Tyre / Cast Iron Centre, 1800kg, 25.4mm Taper Roller (200PTTC)
£233.67200mm Polyurethane Tyre on a Cast Iron Centre W... Read Moreheel (Revvo Wheel) with 25.4mm (1 Inch) Taper Roller Bearing, 75mm Tread Width and 89mm Hub Length (the distance through the central bore). Load Capacity = 1800kg
This polyurethane tyre has a high tear strength, exceptional abrasion resistance and a useful life of up to 10 times that of equivalent rubber tyres under similar conditions and loads.
