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Chromag Surface Frame

Item #: FR194A00
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Chromag Surface Frame

CHROMAG SURFACE 29"/27.5"+ FRAME

a big wheel bike that's ready for big mountain riding

In a world filled with all mountain bikes built around full suspension designs, there is something primal about a hardtail that is designed to take on truly challenging trails with candor and grace. Enter the Chromag Surface. Chromag honed this big wheel platform into the perfect all mountain machine. Designed around a slack head angle, short stays, and the uniquely stiff-but-supple effect of high quality steel, this bike is ready for anything. Being a hardtail, you can efficiently tackle climbs like a champ, but be reassured that this frame will eat up the chunder of a technical descent as well.  And, with Boost 148 spacing you can run this bike in either a 27.5"+ or 29" wheel configuration. Build it to your personal preference, or, if you can't decide, build it with both wheelsets so you can pick your poison on any given day. 

Features

  • Handmade in British Columbia, Canada allows Chromag to specialize each tube to create the perfect frame
  • Chromag Custom True Temper and Aircraft grade 4130 chromoly creates a strong, stiff, and reliable frame with a great ride feel
  • Chromag's trail honed geometry means that you can push this hardtail to the limits with confidence
  • Design optimized for a 120 - 150mm fork allowing you to build your bike to your riding style and terrain
  • 31.6mm diameter seat tube with Stealth routing gives clean aesthetic to adding a dropper seatpost
  • 'Yokel' chainstay junction is a unique frame design that accommodates both tire and chainring clearance
  • 29 x 2.5” or 27.5 x 2.8” tire clearance so you can pick your perfect wheelset to match your mood
SPECIFICATIONS
Frame Chromag Surface 29/27.5+ chromoly steel all mountain frame
Wheel Size 29 x 2.5” or 27.5 x 2.8” tire clearance
Fork Optimized for a 120 - 150mm travel fork
Rear Shock N/A
Headset Included ZS44/ZS56, not included
Headtube Diameter Tapered 44mm-56mm
Front Derailleur 34.9 clamp
Bottom Bracket 73mm threaded
Seatpost 31.6mm diameter with internal cable routing
Seat Clamp 35mm seat collar, not included
Dropout Style 148x12mm Boost
Accessory Mounts Water bottle cage mounts on down tube
Cable routing External for shifters/brakes, "stealth" routing for seatpost dropper
Intended Use All-Mountain
Weight 2.95 kg 
6.5 lbs (size medium)

Note: Components are subject to change without notice.

”GeometryChart”/  
GEOMETRY (mm / inch) *measured with a 150mm fork 
Size Small Medium Med/Large  Large Extra Large
A: Seat Tube Length 394
15.5
431
17.0
470
18.5
495
19.5
533
21.0
B: Effective Top Tube 578
22.8
603
23.7
622
24.5
648
25.5
667
26.3
C: Stack 647
25.5
647
25.5
647
25.5
647
25.5
647
25.5
D: Reach 410
16.1
434
17.1
453
17.8
479
18.9
498
19.6
E: BB Height 320
12.6
320
12.6
320
12.6
320
12.6
320
12.6
F: BB Drop - - - - -
G: Head Tube Length 115
4.5
115
4.5
115
4.5
115
4.5
115
4.5
H: Head Tube Angle 66.5 ° 66.5 ° 66.5 ° 66.5 ° 66.5 °
I: Seat Tube Angle 75.0 ° 75.0 ° 75.0 ° 75.0 ° 75.0 °
J: Standover Height - - - - -
K: Chainstay Length 425
16.7
425
16.7
425
16.7
425
16.7
425
16.7
L: Wheelbase - - - - -
Suggested Rider Height 156-170
5'2"-5'7"
165-178
5'5"-5'10"
171-187
5'8"-6'2"
183-193
6'-6'4"
190-199
6'3"-6'7"
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    • Slovenia
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    • South Africa
    • Spain
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    Free Shipping Offer

    Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

    Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.