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What does the 13-20 rim spec. refer to?

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What does the 13-20 rim spec. refer to?

Old 06-25-23, 01:24 PM
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What does the 13-20 rim spec. refer to?

I'm looking at a vintage early 1980's Raleigh on Craigslist and the rim size is specified as 13-20 along with the 27" rim diameter. What does the 13-20 mean? See photo.



See rim specs
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Old 06-25-23, 01:32 PM
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1320 is the model number, but also refers to an inner width of 13mm and outer width of 20mm. Snappy and useful.
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Old 06-25-23, 01:33 PM
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Originally Posted by Raleigh71
I'm looking at a vintage early 1980's Raleigh on Craigslist and the rim size is specified as 13-20 along with the 27" rim diameter. What does the 13-20 mean? See photo.



See rim specs
Odds are that it refers to the inside and outside widths.

Last edited by FBinNY; 06-25-23 at 05:44 PM.
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Old 06-25-23, 01:34 PM
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Originally Posted by ThermionicScott
1320 is the model number, but also refers to an inner width of 13mm and outer width of 20mm. Snappy and useful.

Hey thanks! I'll see what size tires the seller has on it. Sounds like it would handle pretty skinny tires.
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Old 06-25-23, 01:37 PM
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Originally Posted by Raleigh71
I'm looking at a vintage early 1980's Raleigh on Craigslist and the rim size is specified as 13-20 along with the 27" rim diameter. What does the 13-20 mean? See photo.



See rim specs
internal tire bead seat width and external brake track width...it could possibly be a model designation too... but it sure sounds like the specs. Get out your measuring tools and see...?

Why do you ask?
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Old 06-25-23, 01:46 PM
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Originally Posted by maddog34
internal tire bead seat width and external brake track width...it could possibly be a model designation too... but it sure sounds like the specs. Get out your measuring tools and see...?

Why do you ask?
I'm looking at a classic Trek (not Raleigh, my error) to modify into a flatbar bike and this caught my eye as a possibility. Here's the listing.

https://grandrapids.craigslist.org/b...628614130.html
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Old 06-25-23, 01:54 PM
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Originally Posted by Raleigh71
I'm looking at a classic Trek (not Raleigh, my error) to modify into a flatbar bike and this caught my eye as a possibility. Here's the listing.

https://grandrapids.craigslist.org/b...628614130.html
make certain that the seat post and gooseneck steerer will Move before buying it... they've had 40 years to rust in place....... sounds like the owner has already done some maint., so they SHOULD be ok.. make sure ! Bring an allen key set and some wrenches along... Great Bikes, btw... note the first bike listed in my avatar...
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Old 06-25-23, 01:57 PM
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Originally Posted by Raleigh71
Hey thanks! I'll see what size tires the seller has on it. Sounds like it would handle pretty skinny tires.
Tire sizes for 27" wheels are pretty limited, 27 x 1 1/8, 27 x 1 1/4 and 27 x 1 3/8 are pretty much all there is with 27 x 1 1/4 being the most common, roughly equivalent to 700 x 32 in width
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Old 06-25-23, 02:18 PM
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Originally Posted by alcjphil
Tire sizes for 27" wheels are pretty limited, 27 x 1 1/8, 27 x 1 1/4 and 27 x 1 3/8 are pretty much all there is with 27 x 1 1/4 being the most common, roughly equivalent to 700 x 32 in width
Thanks for the tips! One other thing I always check for is how warped the crank is. Reverse spin it while sighting down it. If it's significantly warped beyond ~1 mm that's a no-no.

And yes, you're limited in 27" tire size these days. And I really loved the 27" X 1" tires I had on my Raleigh SuperCourse before it went to heaven. There is still one source for those I found in a cursory search.
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Old 06-26-23, 05:56 PM
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Originally Posted by Raleigh71
Hey thanks! I'll see what size tires the seller has on it. Sounds like it would handle pretty skinny tires.
I recently fitted some 25 mm tyres to these rims, which looked just right on the mid-1980s bike; larger or smaller will work - I've used them with 19 mm tyres and 35 mm. But mine are 700C rims, yours are 27" so you'll be looking for a 27 x 1" or thereabouts, there's not much choice because it's an obsolete size. It might be easy to convert the bike to 700C - there's only 4 mm difference on the radius, then you'd have a much better tyre choice (for the cost of a pair of wheels).
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Old 06-26-23, 06:13 PM
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Those Rigida 1320 rims were pretty light and built up nicely (in the era where spoke tensions were a bit less than today's). However they have/had a rep for being a bit soft and easy to get a blip on a pothole.

But the 27"/630 diameter is the deal breaker for me. Andy
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Last edited by Andrew R Stewart; 06-26-23 at 07:40 PM. Reason: mistakenly said 622, should be 630
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Old 06-26-23, 07:01 PM
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[QUOTE=Andrew R Stewart;22935801]Those
Originally Posted by Andrew R Stewart
Those Rigida 1320 rims were pretty light and built up nicely (in the era where spoke tensions were a bit less than today's). However they have/had a rep for being a bit soft and easy to get a blip on a pothole.
They are made of cheese, the one I just rebuilt had several dings that I coaxed back into place with pliers. The advantage of soft aluminium is that it bends rather than cracking - I used to regularly remove large flat spots from Rigida rims with a rubber mallet. I'm hoping that I manage to avoid further damage, if I like the bike I might treat it to some Sunday wheels.
Originally Posted by Andrew R Stewart
But the 27"/622 diameter is the deal breaker for me. Andy
Did you mean 27"/630?
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Old 06-26-23, 07:05 PM
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Originally Posted by Andrew R Stewart
Those Rigida 1320 rims were pretty light and built up nicely (in the era where spoke tensions were a bit less than today's). However they have/had a rep for being a bit soft and easy to get a blip on a pothole.

But the 27"/622 diameter is the deal breaker for me. Andy
I agree: the 27" rims is definitely a limiting factor in tire choice. There was one other Craigslist bike I was considering that might be a better choice:

https://grandrapids.craigslist.org/b...619860431.html

I've always gotten bikes with a 25" or 25.5" frames. This is 24". It might fly since I was planning on making a flatbar bike out of it with a high handlebar quill so the frame size might be less critical.

It's priced about the highest you'd ever pay for a bike like that, not considering the additional cost of modification required.

Last edited by Raleigh71; 06-26-23 at 07:09 PM. Reason: add additional info
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