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Wheel rim compatibility ETRTO 355

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Wheel rim compatibility ETRTO 355

Old 04-18-20, 08:50 AM
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timo888
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Wheel rim compatibility ETRTO 355

I've recently discovered that rim choices are very limited in ETRTO 355 here in the US. Will the two rims shown in the diagrams below be reasonably safe to use with a 32-355 Schwalbe Kojak? They're about a millimeter too narrow for the tire, according to Schwalbe's chart, which puts the tire in the 15-19mm rim-width range. https://www.schwalbetires.com/tech_info/tire_dimensions


rim diagrams
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Old 04-18-20, 03:57 PM
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According to this website, they recommend 50-65% rim width to tire width. For 35mm tire, that would be 17-23mm.
13.7mm rim is probably for 20-28mm tires.

The rim you showed is probably Kinlin XR240.
You could probably look at Kinlin TL21, which is 21mm, or Jetset CH240 which is 18mm (surprisingly heavier than the Kinlin).
https://www.ginkgo-veloteile.de/gink...8-Inch-355-mm/
They write on the website that shipping to the US is 37 euro, probably DHL. However, if you used air mail, I think it's around 14 euro to be delivered by USPS.
These prices include 19% tax, so the Kinlin TL21 would be 38 euro without tax if exporting out of EU.

Edit: oh, the Kinlin TL21 that they have seems to be for disc brake only. The english page has errors, it's not carbon.

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Old 04-18-20, 11:59 PM
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Mountain bikers run way wider tires than the recommended rim width all the time without any problems. Hence I would not think a millimeter or 2 should be a problem in your case.
The worst that happens is the tire profile is slightly more "light bulb" shaped than it would be on a wider rim.

This might be a concern if the tire had a specific center tread pattern and a different side tread pattern for cornering.
But it appears the Kojak has the same pattern edge to edge so I would not think this should be an issue.
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Old 04-19-20, 02:37 AM
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The most common rim in ETRTO 355 is the Alex Crostini 1.1. You should be able to find it in the US.

These narrow rims could fit for the Kojak but then you will be limited to the Kojak because most other ETRTO 355 tires are wider.

But the real question is the future of ETRTO 355: this size is almost only used by the Birdy and there are few tires available.

Another solution to have more tires is to switch to ETRTO 349 or if you want a sport Birdy with narrow fast tires to ETRTO 406 like Pacific Cycles did for the latest version of the Birdy R11 which is now factory equipped with ETRTO 406 wheels.
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Old 04-19-20, 03:14 AM
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Originally Posted by unikid View Post
Mountain bikers run way wider tires than the recommended rim width all the time without any problems. Hence I would not think a millimeter or 2 should be a problem in your case.
The worst that happens is the tire profile is slightly more "light bulb" shaped than it would be on a wider rim.

This might be a concern if the tire had a specific center tread pattern and a different side tread pattern for cornering.
But it appears the Kojak has the same pattern edge to edge so I would not think this should be an issue.
Thanks for the information about the absence of any tread issues there. I was hoping that a mm wouldn't make much difference. Glad to hear that it shouldn't.
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Old 04-19-20, 03:20 AM
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Originally Posted by Jipe View Post
The most common rim in ETRTO 355 is the Alex Crostini 1.1. You should be able to find it in the US.

These narrow rims could fit for the Kojak but then you will be limited to the Kojak because most other ETRTO 355 tires are wider.

But the real question is the future of ETRTO 355: this size is almost only used by the Birdy and there are few tires available.

Another solution to have more tires is to switch to ETRTO 349 or if you want a sport Birdy with narrow fast tires to ETRTO 406 like Pacific Cycles did for the latest version of the Birdy R11 which is now factory equipped with ETRTO 406 wheels.
Thanks for the tip about the Crostini. I did not know it was made in 355. When you say that they "should" be available in the US, I take it you mean that if I looked around, I'd probably find them, not that in a perfect world they would be available :-) When I emailed ALEX North America last week, they said they had nothing in ETRTO 355.
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Old 04-19-20, 03:47 AM
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Yes, I mean that you should find them in the US.

All Birdy currently sold by R&M use Alex Crostini 1.1. Part of the Birdy from Pacific Cycles too.

For Alex NA, I do not know.

Its possible that the ETRTO 355 Alex Crostini 1.1 are made by Alex on demand of R&M and Pacific Cycles like for instance several Schwalbe tires in ETRTO 349 (One, Marathon Racer black and tanwall, Kojak folding black and Tanwall) are made by Schwalbe on demand of Brompton and do not appear in the official product list of Schwalbe.

I saw some websites in Europe selling the Crostini 1.1 in ETRTO 355 like this one and this one.

There are also often some on eBay: like this one in 32 holes and this one in 24 holes.

Below the size of the Alex Crostini 1.1 ETRTO 355.


Last edited by Jipe; 04-19-20 at 05:10 AM.
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Old 04-19-20, 07:00 AM
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Originally Posted by timo888 View Post
Thanks for the tip about the Crostini. I did not know it was made in 355. When you say that they "should" be available in the US, I take it you mean that if I looked around, I'd probably find them, not that in a perfect world they would be available
I moved to 406 when I had my wheels rebuilt due to tire availability. I can send you my 355 set of these rims if you like since I can't think of a reason I'd use them instead of 349.
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