FIT Bike Co. FAF OG Trail Knobby BMX Tire 20" x 2.25" (2.36" Inflated)

The FAF OG Trail Knobby is a 20" BMX tire with an aggressive knobby tread pattern, originally developed as a front dirt tire but now widely used front and rear across both dirt and street riding. Despite being marked 2.25", the tire measures 2.36" when inflated — a relevant detail for riders checking rim and frame clearance. It is the only FAF tire with a knobby tread and comes standard with a puncture-resistant Kevlar belt and tear-resistant Silkworm casing.

Key Features

• Aggressive knobby tread pattern — Medium-depth knobs with micro knurling between them provide grip on loose dirt and trail surfaces while remaining functional on concrete and street obstacles, making this a genuine dual-purpose tread rather than a dedicated dirt-only tire
• Puncture-resistant Kevlar belt — Kevlar layer beneath the tread resists punctures from sharp debris on both trail and street surfaces, extending tire life and reducing flat frequency across both environments
• Tear-resistant Silkworm casing — Reinforced sidewall casing resists tearing from impacts, abrasion, and sidewall cuts that trail and street riding regularly produce
• 110 PSI max rating — High maximum pressure allows the tire to be run firm for street and park use or at lower pressure for more grip and compliance on dirt, giving riders flexibility across terrain without a tire swap
• Actual inflated width of 2.36" — Measures wider than the marked 2.25" once inflated; confirm frame and fork clearance against the actual 2.36" inflated width before purchasing

Technical Specifications

• Brand: FIT Bike Co. / FAF
• Model: OG Trail Knobby
• Marked size: 20" x 2.25"
• Actual inflated width: 2.36"
• Max pressure: 110 PSI
• Casing: Silkworm tear-resistant
• Puncture protection: Kevlar belt
• Weight: 24.6 oz

Compatibility and Ideal Use Cases

Fits standard 20" BMX rims — confirm actual inflated width of 2.36" against frame and fork tire clearance specs before mounting, particularly on frames with tight clearances marked for 2.25" maximum. Originally designed as a front tire for dirt but performs effectively front and rear on both trail and street. Best suited to riders who move between dirt and street and want a single tire that handles both without significant compromise in either environment.