-
Got a worrying feeling this means I need a 1930s bike to go with it.
I think it does :)
-
I think your Wikipedia link is broken. This one should (lol, will it?) go to the Hiduminium alloys: https://en.m.wikipedia.org/wiki/Hiduminium
I just got completely sucked into reading all of that and then got onto Duralumin and Y Alloy. Had to stop! Interesting stuff, so it’s a casting alloy and needs heat treatment, followed by age-hardening at room temperature for a week. Strikes me that it’s not very stable and I’d wonder about its physical properties being the same after 80 years! I’d wager that many failures might have happened as a result of this or incorrect heat treating. It’s not exactly the strongest stuff to start with either. State of the art at the time though!
Your stem there, check the stem diameter because it’s an early one. Earlier stems for head clip headsets are 22mm compared to the usual 22.2mm and you won’t be able to use it in a fork with a conventional headset. Apologies if you already knew that!
You are reading a single comment by @veloham and its replies.
Click here to read the full conversation.
SideshowBob
Jonny69
@veloham
Thanks @clubman and @Jonny69 all great stuff, although I can't say it fills me with enthusiasm for fitting cotters! I have a BSA set to fit to a 1948 Hobbs so it's in my future nonetheless and I'm sure that'll all be helpful.
I've recently got hold of a Reynolds 2 bolt stem, it looks like a really early one to me, wanting to share details and pick anyone's brain that cares to pitch in. I've not seen markings like this before, only the version with "Reynolds" in the recessed bit of the projection. I guess the patent number 1121-36 means a 1936 patent date, which makes sense with the advert I found on Graces Guides from July of that year. [I hadn't realised that R.R. 56 was the Hiduminium alloy rather than a Reynolds model name - details here https://en.wikipedia.org/wiki/Hiduminium.] I have no clue what the markings on the non-drive-side of the clamp mean.
Got a worrying feeling this means I need a 1930s bike to go with it.
2 Attachments