Patrick398

I bought some 700 x28x tyres for this old Peugeot UE-8 but i cannot for the life of me get them on. I know some tyre / rim combos can be tight but i'm not even getting close. I'm so far from getting them on i'm starting to think the wheels are not the size i thought they were, but i don't know too much about these things.

I measured the diameter of the rear wheel with a tape measure and i'm getting about 63cm. I measured the circumference with some string and it was about 196cm

Is it because i went for tyres with a snazzy tan rim like a fool?

I'll try post a picture when i'm allowed

Thanks

EDIT: I really don't think i'm just being a wimp here, they really really just will not go on so i don't think it's a matter of technique or strength

Patrick398

Here we go:

shoota 

Sounds like you have 27" rims to me.

ThermionicScott 

That's a tubular rim, if I'm not mistaken. You wouldn't be able to use 700C or 27" clincher tires on it.

steelbikeguy

am I hallucinating, or are those tubular rims that you are putting a clincher tire onto?

Steve in Peoria

nlerner

Yeah, 63cm diameter = 630mm ERD or 27" rims.

nlerner

Hold the phone--tubular?!

SwimmerMike 

Hard to tell from the angle of the picture, but it looks to me like those are rims for sew-ups (tubulars). I'm just looking at the holes for the spoke nipples and how close they are to the top edge of the rim.

SwimmerMike 

Wow. In the time I was looking at the post and thinking "tubular", three responses of the same thing....

gugie 

Can you post another picture showing the straight on?

RustyJames 

Definitely tubulars and those present their own challenges. See the “totally tubular” thread in the stickies.

repechage

Totally different species
tubulars and 700c do share ( it super close) the same brake track diameter and that’s about it.

Patrick398

Thanks for all the replies, I think it's back to tyre school for me. Not that I ever went, clearly.

I think you've all correctly identified the problem. When I removed the old tyre it just kind of peeled off from all this sticky **** on the rim. I thought maybe it was just really old or something but I didn't realise the rims themselves are specific to a type of tyre. AMATEUR HOUR!

So I guess it's new tyres or new rims now...and tyres are alot cheaper. Do I have to give up my snazzy tan walls?

Thanks again for the help. I'm a tad embarrassed but at least I learned something!

squirtdad

you can get tubular in tan sidewalls, suggest Challenge Elite as a decent tire (tyre) but not too expensive

Patrick398

Is the reason the tyres aren't fitting because they're clincher or because the wheels are not 700c or both?

I think I'm actually leaning towards just getting new wheels, less arsing around in the future. If I buy 700c clincher rims my current clincher tyres will definitely fit right?

Also, (sorry for all the questions) is there a limit to how many cogs I can get on a rear cassette with the simplex derailleur? The currently have no front derailleur so I'm wondering if I get a few extra gears at the back

SwimmerMike 

Hi Patrick398 - Both tubulars and clinchers can be 700c. Your tubular rims are 700c but 700c clincher tires are not compatible. Two choices, get some 700c clincher wheels -or- get some tubular tires. There's an argument for each. Many on this forum ride tubulars and many ride clinchers (I have clingers and tubulars for both my vintage bikes, but ride tubulars 90% of the time). Your 700c tires (assuming they are labeled as such) will fit on 700c clincher rims.

Mike

Miele Man

Yes, your clincher tires will fit clincher rims if t=you buy new clincher wheels. You might find nice 700C clincher wheels at a bicycle co-op if there is one close to you.

Yellow Jersey in Wisconsin has Servizio Corse tubular tires for Three for Sixty Bucks. tubular tire sewup tire Servizio Corse $19.95 tubular tires at Yellow Jersey; possibly the Best Value Tubular In America for 2021!

Cheers

Patrick398

Ok thanks for clearly that up for me, it's a lot simpler in my mind now. Considering I can get a set of new rims for about the same price as some tubular tyres I think I'll opt for getting new rims, seems like it will be cheaper in the long run. Plus I've already bought tubes and tyres.

Does this set look appropriate? I'm wondering whether my current simplex derailleur will be able to take a 7 speed cassette. I can adjust it easy enough, I'm just not sure if there's some other reason they won't be compatible
https://www.ebay.co.uk/itm/115032061...hXcri&LH_BIN=1

Thanks again

squirtdad

Dude, I think your best bet would be to find a mate who knows bikes for help, the pints at your local will be way less than buy a lot of wrong parts.

to start with you need to measure the rear dropout distance..... should be 120 or 126 wheels need to match, if it is 120 these wheels don't match

you also have potential issues with clearance for 7 speed, and needing to consider chain length and if derailler can handle.

A bike is a system and parts need to match, it can't really be approached part by part

shoota 

You'd need to make sure your brakes can reach 700c rims.

Patrick398

Ok I'll try and learn how to take the relievant measurements tomorrow so I have a better idea of what I need.

Thanks for your help so far everyone

repechage

Not sure how you determined the Peugeot model.
The UE-8 came with steel rims, 27" x 1-1/4" (630 )
The wheels you have are not factory for that model.
The comment on brake pad reach is that 700c or tubular rims have an approx 4mm smaller radius.
Peugeot DID make a basic bike with Tubular wheels. the PA-10
At this point before you venture off for new wheels, keep in mind, the frame spacing is no doubt 120mm, a 7 speed might be 127-130mm
Getting an old Simplex to reach that inboard cog, may or may not work.
More referencing is in order, and a few overall and snaps of the greater drive train will help.
Lots of things could have happened in the last 4 decades or so.
Depending on the age of the bike, the freewheel on the tubular rim wheel you have might be of French thread. Won't work with new production prebuilt wheels, which are English or (ISO) threading.
or of the freehub type where they use a cassette.
There are other things too, french frames may not have enough stay clearance for a 7 speed cassette or freewheel, the smallest cog could well be too close.

All this is solve-able.
Test, don't guess.

T-Mar

It's not an issue if a tubular is being replaced with 700C, as they both have the same brake radius dimension. If the brakes work with tubulars, they'll work with 700C. You don't even have to adjust the pad height.

shoota 

Super cool.

Patrick398

I did a fair amount of digging about the model and I think someone on this forum suggested it was a UE8, subsequent internet searching has confirmed it in my mind at least. I think the half chromed forks is a give away.

So the wheels have been replaced at some point to tubular rims. I'm guessing that's why the original Mafac Racer calipers are gone. On the front there is a Weinmann Symmetric and there's nothing on the back. (I have another thread about trying to find an adapter/caliper for the vertically drilled mounting hole)

If, as has been suggested, switching from tubular to 700c wheels presents no issues with brake reach I guess I just need to determine frame spacing at the front and rear. I will stick with a 5 speed cassette if it will keep things simple.

I don't have many pictures at the moment but I'll try to take some more tomorrow while I'm taking relevant measurements...once I work out what the relevant measurements are.