Surge Evo

More info

Product info

Riders around the world have been shredding bikes built on this frame in all sorts of setups and indeed, although originally designated to be a pure-blooded freeride hardtail, the Surge is a great all round frame for anyone who likes to go hard. Perfect for new school freeride, yet at the same time comfortable on longer rides and great for dirt jumping. It will work correctly with 120 – 160 mm forks and 650B or 26” wheels. The Surge Evo will fit your favorite dropper post easily and will accept forks with both standard 1 1/8” or tapered 1.5 - 1 1/8” steerer tubes


- designed for All Mountain, Freeride
- high-end cromoly steel tubes
- aggressive geometry (slack HA, low BB).
- adjustable CS lenght via sliding dropouts

Technical specification

Material: custom butted 4130 cromoly

Sizes: available in 2 sizes M: 15.5” , L: 17”

Recommended fork travel: 120-160mm

Head tube: integrated tapered IS42/IS52, head tube length: 115mm 

Fits forks: fits forks with standard 1-1/8” or tapered 1.5 1-1/8” steerer tubes

BB: threaded 73mm with ISCG-05 mounts

Biggest chainring: up to 36t

Rear hub: 135x10mm, sliding vertical dropouts (adjustable CS lenght)

Disc brake: disc brake mount IS (International Standard), max rotor size: up to 200 mm

Max tyre size: 26”x2.6” or 27.5”x2.4”

Front derailleurs: top pull, dia. 34.9. High clamp only.

Seat post: 30.9 / seat clamp: 34.9

Max seat post insertion: 300mm

Cable routing: stealth cable route with rubber grommets in seat tube for dropper post

Weight: ~2.73kg (M size, w/o axle)


Please note that the Trans Olive finish has an inferior resistance to rust. To prevent it from deteriorating please avoid riding in wet, leaving the bike in the rain or storing the bike in damp rooms. Even if these conditions are fulfilled, NS Bikes does not guarantee that the finish will not deteriorate over time.


Specifications subject to change without notice. Actual colours and design may vary slightly from the images on the website.


Surge Evo   M L
Wheel size 26"/27,5"  
Based on fork travel 160,0 160,0
Reach mm 387,0 409,0
in 15,2 16,1
FC mm 691,0 713,0
in 27,2 28,1
Standover mm 790,0 808,0
in 31,1 31,8
Stack mm 613,0 613,0
in 24,1 24,1
Effective TT mm 585,0 606,0
in 23,0 23,9
Actual TT mm 572,0 584,0
in 22,5 23,0
Seat tube mm 393,0 432,0
in 15,5 17,0
Chain stays mm 411,0 411,0
in 16,2 16,2
BB rise mm -13,5 -13,5
in -0,5 -0,5
Headtube angle 65,5 65,5
ST angle effective 72,0 72,0
Wheelbase mm 1103,0 1124,0
in 43,4 44,3