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Old 05-26-13, 08:20 AM   #1
richarnd
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1980s Peugeot -> 2-speed city bike (need advice to complete build)

I've just (nearly) finished a build of an old 1980s Peugeot steel frame and fork into a second bike for riding around town (DC) and fair-weather commuting (about 5 miles). Before building this one I had one bike for longer weekend rides and for daily use, but I got tired of having that one stolen. I hope this one is a less attractive target.

Pics and details on the build below, but there are two spots where I could use some advice:

1) I haven't ridden riser bars in a while, so I'm not sure how to adjust them. These (as you can see) have a very slight rise, which I currently have angled up and back at about a 45 degree angle. Is this "right"? Is there a "right" or can I rotate the bars as a first-cut option for sizing my reach and posture? Stupid question, surely. I think the drop bars have gone to my head.

2) There's very little clearance between the front tire and the front brake. So little that I had to use a 23mm tire (rear is a 30mm cross knobbly since it's what I had around). It works, but if I pick up rocks or the tire swells a lot in the heat, it's going to rub. I already pulled the axle down as far as I'm comfortable in the fork dropout - this helped a little. I don't think I can file down the brake arm in the center as it has an open center - there's not much material there. Do I need some kind of offset bolt? Is this little clearance going to be a problem? Why is this even an issue - the frame was sold with 27" tires, so I should have plenty of room for these 700cs, right?

Frame: 1980s Peugeot Carbolite 103 steel (maybe a 1984 P6 or P8?)
Fork: Original (I think) Peugeot cromoly
Rims: new single wall
Crankset: Metropolis City 45t
Rear hub: SRAM Automatix
Seat: 1980s salvage from parts bin (to minimize attractiveness)
Seatpost: BMX 22.2 shimmed up with a dremeled 1.8mm shim + 1 layer of Sapporo can to get to ~24.0 funky french diameter (buying a post that fit would have cost more than the frame)
Brakes: Tektro R580
Bars/grips/levers: Parts bin or Amazon
Lights: 3-pack of knockoff chinese froggys (these rock and are <$5 for the set)

Bike:


Brake clearance:






Looking at the pics, I see I can get a little more reach if I turn the saddle clamp around...

Last edited by richarnd; 05-26-13 at 08:42 AM.
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Old 05-26-13, 05:21 PM   #2
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I think the brake issue is that brake. From what I can tell from the pics,the fork seems ok,it's just the front arm hangs down too far. I'm guessing this bike originally came with centerpulls which had more clearance. I'd def suggest getting another brake rather than doing something sketchy like not having the wheel all the way in the dropout. Maybe source an old centerpull at one of the local co-ops.
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Old 05-26-13, 05:30 PM   #3
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Originally Posted by dynaryder View Post
I think the brake issue is that brake. From what I can tell from the pics,the fork seems ok,it's just the front arm hangs down too far. I'm guessing this bike originally came with centerpulls which had more clearance. I'd def suggest getting another brake rather than doing something sketchy like not having the wheel all the way in the dropout. Maybe source an old centerpull at one of the local co-ops.

Hmm. I suspect you're right that it's the particular brakes I'm using. But I don't think the bike was originally sold with centerpull (canti) brakes - there aren't any bosses for them on the fork. Maybe you mean single pivot caliper brakes? Not sure if they would have more clearance, and I certainly don't know what would have come on the bike originally.

Anyone have a good rec for caliper brakes with good clearance (not more/less reach)? Either traditional nutted mounting or recessed works.
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Old 05-27-13, 04:27 PM   #4
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This is a centerpull:


They were pretty common on road bikes like that one. Any of the local co-ops would have them laying around. You could also try a long-reach caliper. Sorry,can't name a specific one,discs are my bag.
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Old 05-27-13, 05:02 PM   #5
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Hi,

As stated in another thread your calipers are too far
apart. Move all spacers to the outside of the calipers.

rgds, sreten.
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Old 05-27-13, 07:15 PM   #6
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the brakes seem to lessen the clearance on the front
but even with a different brake or with no brake at all
the crown of the fork will be very limiting on tire clearance
i would be very surprised if you could get the same size tire on the front as you have on the rear

these clearance issues indicate to me
that your frame is not ideal for use as a city bike
luckily
10 sp frames of similar quality but much better clearance
allowing reasonable width tires and fenders
are often less than twenty dollars
including the rest of the bike
if you know where to look

also
those are not riser bars
but flat bars
and the bend should be back towards the saddle
not up toward the sky

and the brake levers should be point down somewhat
anywhere from approximately 15 degrees lower than horizontal
to about 45 degrees from horizontal
although putting them too low isnt the end of the world
but putting them up like that is no good
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Old 05-27-13, 07:16 PM   #7
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Quote:
Originally Posted by dynaryder View Post
This is a centerpull:


They were pretty common on road bikes like that one. Any of the local co-ops would have them laying around. You could also try a long-reach caliper. Sorry,can't name a specific one,discs are my bag.
you are pointing him in the wrong direction
if anything he needs extra short pull brakes
long pull brakes will not work at all
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Old 05-27-13, 08:45 PM   #8
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Anyhow the type is an illustration of a center-pull , they did make a shorter reach type..

other makers too. they were used on race bikes once upon a time..

you might need to shop for another fork. since that one creates the problems you found..

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Old 05-27-13, 09:06 PM   #9
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I'm skeptical whether the front fork is original given your clearance problems. This was a lower end Peugeot and none of them suffered from skinny tire-itis. Is the stem a 22.2 or 22.0? The manner in which the brake is set up is also a problem. You should have gained some clearance in going from 27 inch to 700c. Can you put in a spacer or two on the brake centering bolt to bring it farther out (that way the headset cups won't be an issue)? I really like the ingenuity that you used to keep the costs down on this project but I'd think about better lights on a commuter than those ebay specials.
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Old 05-28-13, 02:52 PM   #10
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Quote:
Originally Posted by Wilfred Laurier View Post
you are pointing him in the wrong direction
if anything he needs extra short pull brakes
long pull brakes will not work at all
I said reach,not pull. The ones on my Verita can easily fit 32's,maybe even 35's.
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Old 05-28-13, 03:09 PM   #11
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Quote:
Originally Posted by dynaryder View Post
I said reach,not pull. The ones on my Verita can easily fit 32's,maybe even 35's.
sorry i meant reach too

the pads in the brakes he has are already at or close to the closest position in the slots
a longer reach brake will not work

it is a somewhat common misconception that long pull brakes can make fatter tires fit on a bike with short reach brakes
but this is not true at all
the tire clearance is mostly determined by the frame or fork

due to the different construction of different brakes
you may be able to add or remove a mm or two of clearance
but not more
the op might be able to increase his front clearance by changing the setup of the brakes he has
as one of the arms is down pretty low

brakes must be selected to match the distance between the brake mounting point and the rim

if you replace a set of short reach brakes that work properly
with a set of long reach brakes
all that will happen is that the pads will not longer be able to contact the rim
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