Stan's No Tubes Crest S2 29" Wheels Improve Your XC or Gravel Riding If you're looking to upgrade your gravel or XC bike, then you might want to get a new set of wheels. The type of wheels you use plays a significant role in your performance and ride quality. The Stan's No Tubes Crest S2 29" Wheels are a great upgrade for your XC or gravel bike. It has a 25mm rim width that is optimized for up to 2. 3" tires. The rim has a BST low-profile shape for easy tubeless inflation and the most reliable seal. The rim is made of 6061 aluminum and has a sleeved joint and stainless steel rim eyelets. The E-Sync hubs offer fast 8. 18deg engagement with reinforced pawls. Features25mm inner rim width that is optimized for up to 2. 3" tires6061 aluminum rim with a sleeved joint and stainless steel rims eyelets E-Sync hubs offer fast 8. 18deg engagement with reinforced pawls Tubeless-ready for a smoother ride, better traction, and fewer flats BST low-profile rim shape for easy tubeless inflation and the most reliable seal Max rider weight: 190lbs (86kg)SPECIFICATIONSWheel Size29"Material6061 Aluminum Outer Width28. 4mm Inner Width25mm Rim Height18mm Spoke Drilling32HValve Type Presta Tubeless Yes Tire Type Clincher Brake Compatibility Disc (6-Bolt)Engagement Degree8. 18degFront Axle15x110mm Boost Rear Axle12x148mm Boost Intended Use Cross-Country, XC, Gravel Approximate Weight874g F, 1030g R | Stan's No Tubes | Crest S2 29" Wheel Rear, 12X148Mm, Micro Spline | Aluminum