Orange Mountain Bikes

Orange Mountain Bikes - ST4 Pro Spec Sheet

From the 2011 Archive


The ST4 may take the name of the old, but it’s all new, a veritable conglomerate of design made to continue our own inimitable niche. The original brought responsive trail handling to a bike designed for regular XC. A low slung trail missile which pedaled efficiently and descended with a rapidity that astounded the most fervent critic. A bike that doesn’t fit a category, but creates one.

2010 Singletrack readers award winner

Built for all-day missions, the ST4 uses a low leverage ratio to produce 110mm of buttery smooth travel. Rather than use a shorter 165 mm shock the ST4 takes a lesson from the blood, running a 190mm custom tuned Fox RP23 shock to give 100mm perfectly controlled progressive travel driven through single pivot linkage actuated design. The geometry that made the original a classic, but updated to markedly stiffen the chassis laterally and incorporate linkage development from the Strange department.

If you want to redefine the rules of XC, the ST4 starts afresh. It might not fit the existing industry tags, but it’s built for the way most of us ride. Up, down and along, the ST4 is the remedy to your bike pondering woes. Just get on and ride, the ST4 does the rest.

Why the ST4 Pro?

The ST4 is that unusual bike which doesn’t masquerade as anything other than a sweet handling XC bike. No modern tag terms, just a fantastic bike built for all-day rides and the rolling trails we love to ride at home. If you want more travel, look at the Five, less travel, consider a hardtail.

Read the reviews for the ST4...

Singletrack ST4 Test

Singletrack Issue 48

Dirt ST4 Test

Dirt - August 2008

ST4 Pro Specifications

RRP £2,919.99
Sizes 16,18,20
Colour Electric Blue
Tubeset Moulded and Formed 6061-T6/ Custom Butted Aluminium Tube
Rear Shock Fox Float RP23 XV
Swing Arm QR Axle
Forks Fox 32 F-RL 120mm QR15
Front Mech Shimano SLX
Rear Mech Shimano XT Shadow 10 sp
Shifters Shimano SLX R Fire +
Brakes Hope Tech X2 183/160
Bottom Bracket Shimano SM51 Hollow Tech 2
Crankset Shimano SLX (3 x 10sp)
Cassette Shimano HG81-10
Hubs Hope Pro 2
Rims Mavic XM317
Spokes DT Swiss Competition
Tyres Maxxis Advantage 2.25
Headset FSA TH857
Stem Race Face Ride XC
Handlebars Race Face Ride XC
Saddle SDG Bel Air
Seat Post Stick Up
Seat Clamp
Pedals Flat


ST4 Geometry
Moulded and Formed 6061-T6/Custom Butted Aluminium Tube
Frame Size 16" 18" 20"
A. Head Angle 68° 68° 68°
B. Seat Angle 74° 74° 74°
C. Top Tube 556 576 599
D. Effective TT 580 600 620
E. BB Height 329 329 329
F. Chainstay 425 425 425
G. Head Tube 120 120 120
H. Wheelbase1104 1125 1147
T. Rear Travel 110 110 110
Shock Length 190 190 190
Seat Tube Ø 27.2 27.2 27.2
Standover699 736 786
Unless otherwise indicated all measurements are in mm.
Frame angles are measured static, without rider sag.
Bottom bracket height measured from ground with 670mm ø tyre.
Fork and Ride Guide

Prices and Specifications are liable to change without notice.