You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more
I’ve got an old orange evo2 that I want to fix up including replacing several parts. Apologies for nuptyness but how do you work out what type and size of components to get? So as a basic example if I was replacing seat post how do I know what width to get, is it as straightforward as simply measuring it? And what about eg a bottom bracket - no idea what I currently have and what to replace with?
if I was replacing seat post how do I know what width to get, is it as straightforward as simply measuring it?
The old one probably has the size stamped on it. If not, measure it with vernier calipers. Standard seatpost sizes were 27.2 and 30.8, but some manufacturers used custom sizes. In that case, you'll get a better selection of posts available if you shim it down to a standard size. You can buy shims in a range of standard sizes.
And what about eg a bottom bracket – no idea what I currently have and what to replace with?
The size should be marked on the old one when you remove it. If you are retaining the same cranks, you'll need the same size BB. If you are buying new cranks, you'll need a BB that matches the frame and the cranks. Just a few standard sizes.
Try the orange website, if you have the frame number they can tell you what type of bb/seatpost size etc.
Standard seatpost sizes were 27.2 and 30.8
27.2, 30.9 and 31.6 are/were the most common sizes.
Set of calipers helps. Looking for numbers etc.
But also google. If you know the year you can often find the information on archived spec sheets and other info - you can then check this against measurements.
And what about eg a bottom bracket – no idea what I currently have and what to replace with?
If current BB works (ie the chainline, clearance etc are all ok) then remove it and read what size it is via the label on it. Unless the casing is really badly rusted/label is illegible then resort to measuring/Googling
*edit, gah, what thols2 said
had a evo 2 for years before selling to a mate - one of the best bikes i ever owned. All reliable old tech - 27.2mm seatpost, 68mm threaded bb shell, straight steerer forks with external headset, standard 135mm q/r rear., Is mounting for the rear disc brake.
great bikes to ride -really comfortable frame. The bike exceeded my skill level in tricky situations.
Thanks all really useful.