Does anyone know the seatpost diameter required for a tinbred frame.

Neither half of my current seatpost has the diameter on it anymore and I can’t remember what it was.

Original Tinbred was 27.2

mine was a 27.2 but was a bit baggy, hence best fit was a 27.3 ragley spike

CHeers. 27.2 rings a bell. it was always an easy fit, but had to do the clamp tight to stop it creaking.

27.3mm does ring a bell!

What kind of lunatic designs a bike with a 27.3mm seatpost?! 🙂

This explains why I have to do up the clamp super-tight…

Detail:
On-One Old Skool 3/2.5 Ti tubing throughout. Lazer cut vertical dropouts, bottle bosses.
Price:
£899 for the frame only
Colour:
Brushed Ti with vinyl graphics
Sizing:
Pick a size, but don’t be too frantic… All our bikes are LONG to make them hammer fast on singletrack when you’re cranking… They’re a touch longer than most bikes to get the most from your power, but also cos we spec them with short rake forks and short stems – even on the large size we only run 80mm stems to give great steering. Check the measurements below.

Note your inside leg measurement should be from crotch to ground in cycling shoes – which is about 2in longer than your trousers (providing they’re the right length)

Height
Inside leg*
Suggested
frame size
Stem length

5’6″-5’10”
28″-31″
16″
60-80mm

5’9″-6′ 1″
30″-34″
18″
60-80mm

6′ – 6’4″
33″-37″
20″
80-105mm

Frame size (Centre-top)
16″ 18″ 20″
Effective top-tube length
23.2″ 23.7″ 24.1″
Head Angle
71o 71o 71o
Seat Angle
73o 73o 73o
BB Height
11.9″ 11.9″ 11.9″
Standover
28.2″ 29.4″ 30.5″
Head tube length 90mm 105mm 120mm

All sizes measurements presume 2.0in tyres (ish)
OTHER STUFF
Seatpost size – 27.2mm (the tube is slotted at the front, to stop muck getting in)
BB Shell – 68mm (axle length of 113mm for most cranks these days)
Seat tube size -32mm seatclamp, 31.7mm front mech.
Headtube size – 1.125in (inch and an eighth)
Warranty: Two years manufacturing defects with a 3yr half price crash replacement warranty.
Custom colours or braze ons: We don’t do ’em. Inbreds are only available as they come.
But remember – at these prices, you could always have a builder repaint/braze on for you.

I might have saved the webpage for future reference 😀

DO I trust Brant who designed and built it on the 27.3 or Thegingerone who saved the original webpage and says 27.2 and do they really build seat posts with 0.1mm tolerances?

like I say, I think it was supposed to be 27.2 but came up a bit baggy. Had a Thomson on it for a while but it would never stay put, once I got the 27.3 Ragley had no further issues.

Still have that in the garage actually, used on other 27.2 seattubes now. Bit of a tight fit in some cases but it doesn’t slip.

do they really build seat posts with 0.1mm tolerances

They are a high class component manufacturer, don’t you know, not some blokes in a shed in Yorkshire. Oh…..

Mine was fine with a 27.2mm, however I was using a bolt up clamp rather than a QR.

Spec is 27.2mm of course, but I do remember some being a bit baggy. Interestingly the 27.3mm post was just a thing we decided to do to help people with slipping seatpost. It wasn’t an issue on Ragley frames we were trying to fix.

I miss my sadly stolen Tinbred…

I do remeber slipping post issues on it, sounds like the reason was the slight oversizing. Bit of grease on my QR and it used to do up tight enough to hold OK, the clamping force on a dry QR is greatly reduced to one with bit of slippy on it..