On-One Inbred review

Iconic steel ride

Our rating 
3.0 out of 5 star rating 3.0
GBP £699.00 RRP | USD $1,139.78

Our review

A spring-heeled, skill-training steel and carbon alternative to all the boring alloy options
Skip to view product specifications

This iconic steel frame is still a smooth riding beauty, but the kit selection of our sample doesn’t do it many favours, even if you’re into more leftfield riding.


Ride & equipment: Poor brakes, skinny tyres and bendy bars obscure potential

There are a lot of experienced riders who’ll like the idea of combining a smooth riding steel frame with a lightweight carbon-legged rigid fork. The fork and long, slim frame tubes both resonate and spring off obstacles together in a similar way. They also mean overall chassis weight is comparable to an alloy frame and fork.

Done right, this can create a really well balanced and enjoyable minimal maintenance ride for less technical trails, or riders who have their wits about them and enjoy a challenge. The low overall weight and long singlespeed-friendly top tube stretch make it an obvious foul weather cross-country/race choice too.

Steel framed bikes tend to appeal to experienced buyers looking to create a cult bike and On-One back up their frames with some distinctive equipment options. You need to know what you’re doing to navigate their ever-changing kit options, though, and get a complementary rather than compromising build like this one when you press the ‘buy now’ button.

The ‘forward then back’ sweep of the bar, with its very light steering action and heavily flexed wrists, takes some getting used to and technical leverage is definitely limited by the narrow width.

The Shimano M575 brakes are low on power and we had real problems stopping quickly. While they’re a big part of the light weight and fast rolling performance, the super-skinny Continental Speed King tyres create an uncomfortably rattly and skittery ride compared with previous 2.35in-shod Inbreds we’ve ridden.

The options will probably have changed by the time you read this, so as long as you know what you’re doing with spec you should be able to put together something that does the excellent basic chassis justice.

Chassis: Great value steel frame with lightweight rigid carbon fork

The ‘non-sliding dropout’ Inbred frame is the geared version of the original On-One singlespeed. The evolved own-blend DN6 tubing gives a great ride for the money, and the tubeset has been updated with a larger diameter top tube and lighter rear stays.

Small outside edge chainstay plates mean there’s no need for a cross brace and the Chris De Kerf-style wishbone seatstay arrangement means tyre clearance is massive. The rack mounts on the laser cut dropouts and wishbone won’t work with disc brakes though, so you’ll have to bolt the optional V-brake bosses back on.


On-One’s carbon fork costs the same as the frame (£125) – very impressive value for a fork that rides as well as more expensive big name options. On-One also provide a range of suspension fork options.

Product Specifications


Name Inbred (10)
Brand On-One

Available Sizes 18" 18" 18" 14" 14" 16" 18" 20" 18" 18" 16" 16" 18" 16" 18" 20" 16" 18" 20" 18" 18" 18" 20"
Rear Tyre SpeedKing
Top Tube (in) 23.7
Standover Height (in) 29.4
Seat Tube (in) 18
Chainstays (in) 16.6
Bottom Bracket Height (in) 12.5
Weight (lb) 26.1
Stem On-One 456, 70mm
Shifters SLX
Seatpost On-One Twelfty Sport
Seat Angle 73
Saddle On-One Big Nose
Rims Shimano M505
Rear Tyre Size 26x2.1
Rear Hub Shimano
Bottom Bracket FSA MegaExo
Rear Derailleur Shimano SLX
Headset Type FSA Sky Pilot
Head Angle 70
Handlebar On-One Fleegle bar, 650mm
Front Tyre Size 26x2.1
Front Tyre SpeedKing
Front Hub Shimano
Front Derailleur Shimano SLX
Frame Material Custom DN6 cro-mo steel
Fork On-One Carbon legged rigid, 0mm travel
Cranks FSA V Drive 44/32/22T
Chain Shimano HG51
Cassette Shimano SLX, 11-32T
Brakes Shimano M575 disc,160mm rotors
Wheelbase (in) 42.9