Part no. ETRTO Dimension Type g PSI 0150728 25-622 700 X 25C Tubeless Ready 305 73-108 0150731 28-622 700 X 28C Tubeless Ready 340 73-94 0150733 30-622 700 X 30C Tubeless Ready 370 56-72 0150735 32-622 700 X 32C Tubeless Ready 385 50-72 *The maximum inflation pressure for hookless and hooked applications as well as the maximum inner rim width can be found on the tire packaging and may differ between hooked and hookless applications.  Grand Prix TR - For Every Ride The Grand Prix TR is a tire built for every ride. It is the perfect option for those looking for a great value tire that is tubeless-ready. The Grand Prix TR inherits technology and learnings from the iconic Grand Prix 5000 range. It comes with BlackChili compound and has an all-new 4-ply construction, that perfectly balances puncture protection and rolling resistance. Whether training, commuting or going the distance – The Grand Prix TR has you covered. For Every Ride. Technical Details BlackChili compound. With our unique tread compound, we have revolutionized the sport of cycling. With the legendary BlackChili Compound we have answered the eternal question of the best balance of grip and rolling resistance for cycling. The latest polymers as well as specially developed carbon black particles and filler materials guarantee unique performance, be it on a road, gravel or a mountain bike, for time trialling or downhill. 4-ply Construction. The robust 4-ply construction balances rolling resistance, low weight and puncture resistance. Tubeless Ready. All Tubeless Ready tires have been designed with versatility in mind. It’s your choice: set up tubeless using Sealant or use an innertube.