Optis Tubeless Tire Insert - 27.5" x 28-40mm Insert w/ Standard Presta Valve CheckoutTitle=AnswerBMX Seatpost Extender Oversized Grade 3 balls roll

Oversized Grade 3 balls roll on races which are ground to a mirror finish after receiving Magnetite and then Cryogenic treatments for hardness and longevity and slippery Silicone seals to produce minimum resistance

Brake Type Disc Color Golden Leopard Defined Color Gold Fork Material Carbon Fork Type Rigid Frame Material Steel Frame Type Rigid Front Axle 12mm Thru x 100mm Mfg Size 52 Rear Axle 12mm Thru x 142mm TT (Effective) 545 Wheel Size 700c Platform Zig Zag

While carbon fiber allows for more optimal design and provides higher strength to weight ratio compared to steel and aluminum it is also more susceptible to crushing and cracking when improperly set up

WTBs KOM Tough series rims feature Dual I-Beam construction to increases strength and stiffness

Optis Tubeless Tire Insert - 27.5" x 28-40mm Insert w/ Standard Presta Valve CheckoutTitle=AnswerBMX Seatpost Extender Oversized Grade 3 balls rollOptis Tubeless Tire Insert 27. 5" x 28 40mm Insert w Standard Presta Valve. OPTIS (Odyssey Pneumatic Tire Insert System) is a lightweight highly tunable high efficiency tubeless tire insert. Tire assemblies are one of the most important performance factors for any bike. They provide all the grip to the ground they serve as a critical first element of the bikes suspension and they provide essential support to the cornering forces that the bike