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Old 03-11-14, 02:06 PM   #1
Bholio
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Old Dahon/hon rear tire <--> fender clearance issues

A few months ago I bought an old 1980s Hon Convertible stainless folding bike. After fixing the frame latch I was able to ride it. The chain felt a bit loose, so I tried moving the rear wheel back a little to tighten it up. After doing this, the rear tire started rubbing the fender, so I moved it back so it no longer rubs. The chain is still too loose, occasionally I can feel it start coming off before falling back into place.

A few days ago, my son brought home another old Hon stainless folder. It has the same problem. I realize the bikes are 30 years old and all, but it is weird to have the same problem on the 2 that we own.

Are these bikes extra-intolerant of stretched chains? Is this a common problem? Or are the plastic fenders shrinking over time? One bike has orange fenders, the other one black.

Mike
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Old 03-11-14, 02:10 PM   #2
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stretched chains?
Mike
20 bucks to find out. buy a nice nickel-plated chain.

also, please post pics.
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Old 03-11-14, 03:26 PM   #3
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20 bucks to find out. buy a nice nickel-plated chain.

also, please post pics.

of course somebody could take a link out and see how long the 30 year old chain will last from now on
:-)
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Old 03-11-14, 05:05 PM   #4
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of course somebody could take a link out and see how long the 30 year old chain will last from now on
:-)
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Old 03-11-14, 08:18 PM   #5
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I need one of those capes
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Old 03-12-14, 06:48 AM   #6
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I was able to reposition the fender on the orange bike which seems to have fixed the problem. The weird part is that it seems like the fender was in the wrong spot all along. There is a bracket on the fender which it bolted to a spot on the frame/rack. The bracket is on the front side of the frame bar.

Here is the bracket on the black bike which I did not touch.. The bracket is bolted to the front side of the frame.

See how badly the fender sits around the wheel, and how far forward the wheel is given the remaining space in the dropout to move it back. Tough to see in the pictures, but the fender is misshapen. The fender is bulged out (in width) by about 1/4" (7mm) in front of the bracket.


I repositioned the fender on the orange bike so the bracket is to the back of that bar. This fender is not bulging, but I did not measure it before moving it.

And see how much better the wheel fits, still lots of room in the dropoout for rearward motion.

The sad part is that the bracket is shaped to be on the front side of the bar, so I had to bend it a bit, being careful to not damage the old plastic, it already had some stress discoloration before I started messing with it. I still need to tap the top down to be flush with the rack.

The tire was rubbing right under the white HON sticker on the fender. Moving the fender has fixed the rubbing. I don't think the chains are stretched. But I'll check them later using Sheldon Brown's method.

Here are pix of the complete bikes for reference. The orange one is in much nicer shape. The black one will be improved once I change the fender and move the wheel back a little. The black bike has a SunTour version of the SA 3-speed with date code of 6/81 and the orange one has a Sturmey Archer hib with date code 1/84.
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Last edited by Bholio; 03-12-14 at 07:15 AM.
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Old 03-12-14, 08:17 AM   #7
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those are cool finds .... they look great
wouldnt mind finding one for myself ..( as if I didnt have enough bikes floating around and no time to ride them all)
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Old 03-12-14, 08:48 AM   #8
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sweet.

word of advice. if you plan to ride the bikes, i would suggest removing those vintage fenders completely. keep them on a shelf for the day you take your bikes to the vintage bike show. especially the orange ones. they are pretty rare. due to their age the plastic is very brittle and they will break very easily. i know from experience..
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