User Information

Notes

Tyre Storage

Tyres should be stored in a cool, dry and dark place away from direct sunlight (suggested storage temperature 25°C ± 5°C). Avoid storing tyres in an area which is wet, oily, or greasy.

Rims

Recommended width of the wheel as specified to be used for optimum performance. However, from the original specified rim width ±0.5" can also be used. ETRTO/JATMA standards can be referred for the correct rim width.

Tyre Mounting & Removal

Mounting and demounting should be done by trained personnel using a suitable mounting machine. Prior to fitment, inspect the rim and tyre for any external damage. Tyres have to be mounted according to the direction and rotation specified on the sidewall. The rim seating area and tyre beads should be lubricated. Recommended tyre pressures to be followed. Check for proper seating of the beads and tyre centring with reference to RCR (rim centre ring) after inflation. Balancing of the tyres must be done.

Left & Right

Directional pattern tyres must be used on the correct side. Left or right and outer side markings on the sidewall must be followed for best performance.

Hand-Cut Tread Pattern

Groove width between the pattern blocks can be widened if required. However, hand cutting the buttons could alter the performance, hence a careful decision is to be made based on the terrain conditions.

Compound Hardness Marking

Rally tyre and racing tyre compounds are designed for different applications, usage, weather conditions and track temperatures. Compound hardness is identified by SS (super soft compound), S (soft compound), M (medium compound), H (hard compound), and W (wet compound).

Compound Selection Guides

Gravel Rally Compound Selection Guide

Compound Track Surface Conditions Track Temperature (°C)
Hardness Working
Temp. (°C)
Mud/
Slush
Soft/
Sand
Medium/
Packed
Hard/
Rocky
Wet Damp Dry -5 0 5 10 15 25 30 35 40+
Soft (S) 25-80                                              
Medium (M) 60-110                                              
Hard (H) 70-120                                              
Wet (W) 20-90                                              

Tarmac (Asphalt)/Circuit Racing Compound Selection Guide

Compound Track Surface Conditions Track Temperature (°C)
Hardness Working
Temp. (°C)
Smooth Medium Rough Wet Damp Dry -5 0 5 10 20 25 30 35 40+
Super soft (SS) 25-80                                          
Soft (S) 40-90                                          
Medium (M) 50-110                                          
Hard (H) 80-130                                          
Wet (W) 20-90                                          

Cold Environments

MRF Motorsport tyres contain high performance rubber compounds and require special treatment when exposed to low temperatures (below 50°C). At these temperatures the tyre has reduced flexibility which can result in cracking of the compound if the tyre is not handled correctly.

In order to avoid damage to the compound at low temperatures, please follow the instructions below:

  1. Before fitting on a wheel rim the tyres should be stored in a controlled environment at a minimum temperature of 20°C for at least 24 hours.
  2. These tyres should always be stored at a temperature above 10°C.
  3. During prolonged periods of non-use the tyres should be removed from the vehicle after reducing air pressure, as this may cause the compound to crack.

Warning

  • ALWAYS mount tyres only on rims which are undamaged, smooth and clean.
  • ALWAYS be sure that the tyre bead diameter is the same as the nominal rim diameter on which it will be mounted. The beads cannot be forced out against rim flanges by using more air pressure because this will break the beads and the tyre will explode with force sufficient to cause serious injury or death.
  • NEVER force the bead(s) over the rim flange or use sharp-edged or improper tools that could damage the bead(s) or other parts of the tyre. When pressing tyre beads over the rim flange, ensure as much as possible of the bead is already over the rim flange, is sitting in the wheel well.
  • ALWAYS inflate the tyre without the valve core inserted into the valve stem. Inflation air should be as dry as possible. ALWAYS inflate tyres in a safety cage or with another restraint device. NEVER inflate beyond 40 psi to seat the beads during tyre fitment.
  • NEVER modify any portion of a MRF racing or competition tyre, such as (but not limited to) by chemically treating the tread compound ("soaking" or "softening" the tread). Any modification could result in premature or catastrophic tyre failure leading to personal injury or death.

Exclusion of Warranty

MRF Limited makes NO WARRANTIES WHATSOEVER, EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR PURPOSE for its racing or competition tyres. MRF EXPRESSLY DISCLAIMS ALL SUCH WARRANTIES. In no event shall MRF be liable for any kind of general, special, direct, indirect or consequential damages including loss of profits, personal injury etc. arising from the use of its racing or competition tyres. All MRF racing a competition tyres are sold AS IS WHERE IS. Purchasers and users ASSUME ALL RISKS associated with the use of MRF racing and competition tyres.

NEVER USE RACING OR COMPETITION TYRES NOT BEARING THE "E" MARK (OR ANY OTHER LEGAL REQUIREMENT IN THE COUNTRY OF USE) ON PUBLIC STREETS OR HIGHWAYS: IT IS ILLEGAL AND DANGEROUS. NEVER USE A RACING OR COMPETITION TYRE ON PUBLIC STREETS OR HIGHWAYS WHICH HAS BRANDING ON ITS SIDEWALL "Not for Highway Use" OR "For Competition Purpose": IT IS ILLEGAL AND DANGEROUS. MRF RACING and COMPETITION TYRES WHICH ARE NOT MEANT FOR ORDINARY ROAD USE AND DO NOT BEAR AN "E" MARK ARE DESIGNED AND COMPOUNDED EXCLUSIVELY FOR COMPETITION USE ONLY. These tyres are NOT tested, labelled or intended to meet FMVSS 109/119 or ECE 30/75.

Sellers, purchasers and users of MRF racing and competition tyres agree to defend, indemnify and hold harmless MRF Ltd., its officials and business associates, from every type of risk, loss, injury, damage, legal proceedings or whatever kind of nature, which MRF Ltd. may incur or suffer as a result of the improper sale, installation or use of MRF racing and competition tyres.

Any dispute with regard to this warranty/exclusion of warranty and claims if any, against the products shall be exclusively governed by the laws of the Republic of India, and subject to the exclusive jurisdiction of the courts in Chennai, India.