NS Bikes Define AL 170 1 2025 Bike

This is the biggest bike in the define range. It’s basically a downhill bike that can be ridden uphill. Mixing wheel sizes is the best solution for a bike like this and after a lot of testing and processing opinions, we have decided to implement a solution that we truly believe makes a lot of sense for many riders. A big, fast-rolling 29” wheel in the front plows through rough terrain and a smaller 27.5 wheel in the rear is tucked in and allows more suspension travel to be applied without contacting the frame or body parts. Let's not forget that this is still a define - which means it is built around a gorgeous alloy frame with custom hydroformed tubes, hidden external cable routing, big bearings and radical geometry!

Oversized Bearings, Sealed Main Pivot

The pivot that is most difficult to replace is hidden inside the frame and remains completely isolated from dirt and water.

Hybrid Cable Routing

The cables appear to be threaded through the downtube and chainstay, but are actually hidden in a special external channel within the frame structure — making them easy to replace anytime, anywhere.

Specifications

Frame and Forks

• Frame: NS Define AL With 170mm travel, AL6061-T6 + AL6066-T6, custom hydroformed tubes, semi internal cable routing (Sizes: Small, Medium, Large)
• Fork: Fox Float 38 Performance Grip, 180mm travel, 3 Pos Micro Adj Lever, 110 x 15mm Boost, 1.5T, 44mm offset
• Rear Shock: Fox Float X2 Performance w/ LSC, LSR Trunnion 225 x 70mm

Drivetrain

• Rear Derailleur: Sram GX Eagle Type 3, 12 Speed
• Crankset: Truvativ Descendant 6K DUB 170mm, 34 Tooth
• Cassette: Sram PG-1210, 12 Speed, 11–50 Tooth
• Bottom Bracket: Sram DUB BSA 73mm
• Chain: Sram, 12 Speed

Braking/Shifting

• Brakes: Front: Sram Guide RE, 200mm / Rear: Sram Guide RE, 200mm
• Gear Shifters: Sram NX Eagle, 12 Speed
• Brake Levers: Sram Guide RE

Wheels

• Front Hub: NS Rotary 15 Boost 110 x 15mm disc (sealed bearings)
• Rear Hub: NS Rotary Cassette 148 x 12mm Boost (sealed bearings)
• Rims: Octane One Solar 29” front, Octane One Solar 27.5” rear, 32h, tubeless ready
• Spokes: Spokes With 14mm nipples
• Tyres: Front: Maxxis High Roller II 29 x 2.5" WT TR EXO / Rear: Maxxis High Roller II 27.5 x 2.4" TR DH

Finishing Kit

• Headset: GW integrated tapered IS42/IS52, sealed bearings
• Handlebar: NS Bar 35, 800mm, 20mm rise
• Stem: NS Quantum Lite 35, 45mm
• Grips: NS Hold Fast
• Saddle: WTB Volt Medium Cromoly
• Seat Post: Race Face Aeffect R – Small: 125mm, Medium: 150mm, Large: 170mm, Ø31.6mm