We measure you.
Then we build
the bike.
A three-dimensional bike fit, then a titanium frame drawn from your numbers and welded by hand under a railway arch in London.
Two ways in
Two and a half hours. Nothing guessed.
00:00 → 02:30
01
00:00 · 20 min
02
00:20 · 15 min
03
00:35 · 30 min
04
01:05 · 25 min
05
01:30 · 30 min
06
02:00 · 30 min
01
00:00 · 20 min
The conversation
How you ride, how far, what hurts, what you want. The boring questions catch the most.
02
00:20 · 15 min
On the table
Flexibility, leg length, foot shape, old injuries. Your body sets the limits, not the bike.
03
00:35 · 30 min
The capture
Six markers, a 3D camera, and you riding at your normal effort. We measure every joint, every stroke.
04
01:05 · 25 min
Saddle & pressure
A pressure map under you, live on the screen. We change the saddle until the map goes quiet.
05
01:30 · 30 min
Cleats & bars
Millimetres at the foot, centimetres at the bars. We adjust, you ride, we measure again.
06
02:00 · 30 min
Your numbers
A fit sheet with every measurement, printed and emailed. Yours to take to any bike, or to us for a frame.
Your numbers become the frame.
We don’t pick a size. Five numbers from the fit set every tube, and we check each one against you.
Fit sheet · Maya R.
14.10.26
Saddle height
742 mm
Setback
68 mm
Reach to bars
512 mm
Bar drop
64 mm
Rides
6 h on gravel
Fit Nº 1240 · Frame SB-0186
Maya’s fit, 14 October. Each line becomes a dimension on her frame.

SB-0186 · Maya · Gravel · Ti 3/2.5 · Brushed
186 frames so far. Each one has a number, and a name.
Prices, on the page.
If the fit says your old bike is fine, we’ll tell you.
A railway arch in SE1. The fit at the front, the welding at the back, and four people who ride what they build.

4.9 · 318 reviews on Google
Twelve years of a sore left knee. Ines moved my cleat two millimetres and dropped the saddle five. That was it.
Daniel K.
Bermondsey
Cleat −2 mm
Saddle −5 mm
Questions, answered plainly.
Next fits.
Tuesday to Saturday · 2 h 30 · Full Fit £280
setback
Fit Nº 1240 · capturing











