Hello everyone,

First post, I just picked up and cleaned up a Peugeot Iseran for $50 bucks.
Couple rust spots here and there but overall cleaned up real nice.(i'm looking to ride it as commuter)
I do have couple questions after looking at all the catalogs and trying to find the specs.

anybody know the size of the handle bar (not quill stem)?
and also is there anyway to replace the helicomatic lockring with another lockring or even with a threaded cog?


Thank you
-hyde

Is this your bike?



If it is, the bike shown in 1986 will have standard British parts. The handlebar diameter at the clamp should be 25.6 mm.

The helicomatic is a potential problem, because they are no longer being made. To replace it, you would need a different rear hub or wheel. If it's still good, and you just need a lock ring, you should look on EBay.

By the way, I have the Corbier model. It is a nice bike to ride despite being at the bottom of the Peugeot line.

If the stem is not a quill style,it has been replaced and you will need to measure the handlebar diameter.

According to their website, Yellow Jersey still has some Helicomatic parts, including the lockring, though it's not inexpensive.

Maillard Helicomatic System from Yellow Jersey

I believe the one I have is an '87 model due to the orange/yellow stripes that are also on the top tube. I don't know if that would make difference in specs. The only thing I need is the lockring as the helicomatic runs fine.
Do you know the dropout width? or any compatible rearhub/wheel without needing to spread the frame?






Also T-Mar, I believe its a quill stem, since it has all original parts. after reading up about the death bars haha, I'm sure it wasn't replaced because when I took it out the stem looked like it was torn like silly putty.

If you have the stripes on the top tube, I was of the impression that those indicated a higher-specification model. Does yours actually say "Iseran" on the top tube?

The hub spacing should be 127, so just about any older 5-6-7speed hub would work if you cannot find a lock ring.

What do you mean by higher-specification model? and Yes it does.

I found couple lockrings but man are they expensive haha, I'll most likely switch it out later down the line.
So I should be able to just switch out the hub?

Finding a good used wheel would be a lot cheaper than just replacing hub. Start with a co-op if you have one. If not post an ad on C/L.

Unless the hub has the same flange dimensions, you will need new spokes and nipples. Then you have to build the wheel. When you are done you have put a fair amount of money into a wheel with a 30 year old rim.

By higher-spec, I mean that Peugeot made other models that used lighter, more durable components or frame tubing. At least in 1986, these "better" models could be spotted because they had the color bars on both the seat and top tubes. But if yours clearly says Iseran, then that is what it is! ;-)

Yes, but as wrk101 said, unless you know how to build wheels you are better off buying one ready made.

I wouldn't have thought the death stem concept ended long before that model. Can you post pics of the stem?

Understood.
I found a deal on amazon, full wheel and freewheel for relatively cheap, I'm thinking I might have to go with that if all else fails

I forget where I read it, I heard they were pretty common on french bikes into the 80's. I'll post a pic when I get a chance


I want to thank everyone for their input

AVA death stem was a 1960s/1970s thing.