Chase RSP 5.0 OS20 Frame Dirt

Note: Ships in 4-5 business days. Delivery time depends on the shipping method chosen at checkout.

The OS20 version of Chase's RSP 5.0 alloy race frame in Dirt and Sand, with geometry refined specifically for oversized 20" wheels, forks and tires.

OS20 exists for larger riders. Running oversized rims, tires and forks gives a bigger, taller rider a more comfortable and better proportioned ride than a standard 20" setup, without moving them onto a cruiser. Chase adjusted the geometry to suit, so the front tire clears properly and the bike handles the way it should rather than feeling like a stretched standard frame.

Everything else is pure RSP 5.0: premium ultralight 7005 T6 tubing, hydroformed and muscle formed, triple and double butted. Brake housing runs internally from the head tube through the down tube and bottom bracket and exits at the chain stay, and the CNC machined rear dropouts with built-in tensioners give excellent clearance across a wide range of disc calipers in both post and flat mount. Note that an OS20 frame requires an OS20 fork for the geometry and tire clearance to work correctly.

Features:

• OS20 geometry refined for oversized 20" wheels, forks and tires
• Requires an OS20 fork for correct frame geometry and front tire clearance
• Aluminum 7005 T6 frame, premium ultralight
• Double butted hydroformed top tube
• Hydroformed triple butted down tube
• Muscle formed rear stays
• New CNC machined dropouts
• Internal brake housing routing from the head tube through the down tube and bottom bracket, exiting the chain stay
• Integrated tapered head tube 1-1/8" to 1.5" for a stiffer tapered steerer fork
• Press fit BB86 bottom bracket
• 3/8" (10 mm) closed dropouts with integrated tensioners, using a standard BMX bolt-in axle
• Aero seat post tube shape for improved aerodynamics and a slightly stiffer feel
• Disc brake only design, compatible with both post and flat mount systems
• Included with the frame: chain tensioner and bolts, housing damper foam
• Not included, sold separately: aero seat post clamp, aero seat post, disc brake adapter, brake housing
• Please note: non-silicone-based brake fluid can act like paint thinner and damage the finish. Do not let brake fluid touch painted parts.