Wolftooth +20mm Flat Mount Brake Adapter for Post Mount Bikes

Upgrade your braking system seamlessly with the Wolf Tooth Post To Flat Mount Brake Adapter—a game-changing solution for cyclists aiming to install flat mount disc brakes on frames originally designed for post mount setups. Whether you’re retrofitting a mountain bike frame with a road groupset or enhancing stopping power on a gravel rig, this adapter bridges the gap between modern brake designs and traditional frame mounts while maintaining precision and durability.

Crafted from precision-machined 6061-T6 aerospace-grade aluminum, this adapter delivers robust performance without adding unnecessary weight. Its +20mm offset ensures compatibility between post mount frame bosses (140mm–180mm) and larger rotors (160mm–200mm), making it ideal for riders seeking increased rotor size for better modulation or improved heat dissipation during demanding rides. For instance, pairing a 140mm post mount frame with a 160mm rotor boosts control on technical trails or descents—perfect for those upgrading their build without replacing the entire fork or frame.

Designed with versatility in mind, this adapter works flawlessly with SRAM and Shimano flat mount calipers, ensuring seamless integration into popular groupsets like SRAM Force eTap AXS or Shimano GRX series. It also requires only 13mm of clearance between the brake boss and frame/fork surface—so you can confirm fitment quickly before purchasing.

Included hardware simplifies installation: two M5x13mm flat head bolts secure the caliper in place, while two M6x15mm socket head bolts attach the adapter to your existing post mount bosses. No extra tools or parts needed—just precision-engineered components ready to optimize your setup.

Why Choose Wolf Tooth?
| Feature | Wolf Tooth Adapter | Competitor Adapters |
|————————|———————————-|——————————-|
| Brake Compatibility | Works with SRAM/Shimano brakes | Limited brand support |
| Rotor Offset | +20mm (direct size correspondence)| Variable offsets (may require trial/error)|
| Material | CNC-machined 6061-T6 aluminum | Heavier steel or plastic |
| Bolt Included | Yes (M5/M6 bolts provided) | Often requires separate purchase|

Ideal for mountain bikers modernizing their rigs or gravel enthusiasts seeking hybrid performance, this adapter empowers custom builds without compromise. Experience reliable braking performance tailored to your needs—whether you’re tackling rugged trails or commuting on urban streets.