Pulled these off an old Dawes that I'm converting into a Fixie. Don't know much about old cottered cranks. They cleaned up very nicely. Don't show much use at all. Luckily, the bike spent most of it's time in a garage. I'm trying to get a guage of their value, if any - or if I'd be better off trading them for something. Here's a few pics: Any ideas ? Bottom bracket races and bearings show little wear as well.

I saw a pair of cranks like that on Ebay last week, buy it now- $30.
Somebody bought them while I was thinking about it.
Don't know much about the rest of the stuff.

That crank looks almost as nice as my Agrati.

If you're selling them, I'd be interested in them for a restoration that I'm doing.

I'll send you a private message.

Sell them to a C&Ver that wants them (not me), other than that, I don't think they have a great deal of value.

If those were mine, I'd use them. Everybody has cotterless cranks in their fixies. Be different!

I have a crankset like the OP's. I like it's looks and it works perfect. Bought it off of EBay for around $18 including shipping, a set of pedals, toe clips and straps. Mine had a little rust. Yours looks brand new.

That is a beautiful crankset! That particular model was produced from around 1954 and made well into 1970s. The Stronglight crank arms with that particular lettering were typically found in use as original equipment on many different bikes. Seldom found in such perfect condition. But, unfortunately actual value is probably quite low. If the bike is in comparable condition I would use the crank on your bike!

You could actually mount the single 42t chainring alone directly on the 3-arm spider.
The BCD of the 3-arm crank is probably 116 mm. and if you are patient you might find larger single chainrings to fit.

DOH! ... spoke too soon! ... here is one on eBay right now which would be a beautiful match and would be VERY practical for your needs too! --> Item #140263809026


The axle is probably the British standard diameter of 5/8" at the ends... and with cotter pins 3/8" (9.5 mm.) ... and I would suspect the cranks even have Standard threads for 9/16" x 20 pedal axles. A shorter axle could be found or just try reversing the left and right sides to check your chain line for use with a single chainring. The typical Stronglight cottered axle total length recommended for use with a single chainring would be around 123 to 127 mm. ... but if the reversed axle is adequate to clear your chainstay just use that one and simply leave the left side crank arm sticking out a wee bit more.

The chainline on my Peugeot above is perfect with a Formula fixed/free hub without reversing the spindle or using washers for spacers. I actually had to omit washers to get more clearance. The teeth clear the crimped part of the chainstay by no more than 2mm. The 52 ring is perfect for me with a 22t cog. I don't understand why most fixies are built with small chainrings. Bigger gears are more efficient and wear less. The only advantage I can think of to smaller chainrings is that chain tension is higher and that makes it easier to skid, but skidding a $30 tire strikes me as stupid.

great info stronglight . heading to ebay as we speak (for the chain ring....not to sell).
I was thinking of running the 52 as well...pretty flat around here. 22 or 24 as my legs aren't what they
used to be.

thanks