What is a rim base protective flap?
04-29-17, 03:13 PM
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What is a rim base protective flap?
A few weeks ago I installed some 28mm tires on my vaya stock rims (WTB i19 TCS) and today I saw this on the WTB site: "All WTB Rims are Crotchet-Type. When inflation pressures over 72 psi / (5-bar) are used, appropriate rim base protective flap must be fitted." The new tires are inflated over 72 psi and the old ones had a max of 65 psi so I don't know if the rims have these protective flaps. Google isn't helping and the only information I get is the quote from the wtb page https://www.wtb.com/pages/wheels. Is it the same as rim tape, which is on the rims?
04-29-17, 04:37 PM
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The Rim strip on the wheels by default, is probably cheap plastic. (usually a transparent-ish yellow thing)
when going to higher PSI, you need to use Velox, a woven fabric webbing type rim strip.
plastic stretches, the fabric doesn't.
and what is a 'Crochet' type rim? don't they mean 'hooked bead'?
its like the website is being read through a Bad Google Translation.
when going to higher PSI, you need to use Velox, a woven fabric webbing type rim strip.
plastic stretches, the fabric doesn't.
and what is a 'Crochet' type rim? don't they mean 'hooked bead'?
its like the website is being read through a Bad Google Translation.
04-29-17, 04:41 PM
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A few weeks ago I installed some 28mm tires on my vaya stock rims (WTB i19 TCS) and today I saw this on the WTB site: "All WTB Rims are Crotchet-Type. When inflation pressures over 72 psi / (5-bar) are used, appropriate rim base protective flap must be fitted." The new tires are inflated over 72 psi and the old ones had a max of 65 psi so I don't know if the rims have these protective flaps. Google isn't helping and the only information I get is the quote from the wtb page https://www.wtb.com/pages/wheels. Is it the same as rim tape, which is on the rims?
04-30-17, 06:29 AM
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Bad translation: That's what I was thinking too. From the context I'd GUESS they are referring to hook bead rims but I really don't know for sure. FWIW, 70psi is about the maximum for straight sided rims.
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04-30-17, 07:07 AM
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A 'crotchet type' rim is a rim with a hooked bead.
I don't know what 'flap' they're referring to, but you'll be fine so long as you're using hooked-bead tires and an appropriate rim strip or tape.
I don't know what 'flap' they're referring to, but you'll be fine so long as you're using hooked-bead tires and an appropriate rim strip or tape.
05-03-17, 05:39 AM
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If anyone cares, I heard back from WTB. The flap is "some fancy legal talk" for rim tape. Which I figured it was.
I have heard the term crochet-type rim before (which they misspelled). As someone who crochets, that makes sense to me, since you use a crochet hook (which is funny since crochet translates to hook).
I have heard the term crochet-type rim before (which they misspelled). As someone who crochets, that makes sense to me, since you use a crochet hook (which is funny since crochet translates to hook).
05-03-17, 06:07 AM
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Entry for 'crotchet' in the Merriam-Webster dictionary
05-03-17, 06:36 AM
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Funny how they equate nonstandard terms as "fancy legal talk" when such can add to confusion on the part of the consumer and thus lead to issues associated with the use of the component.
05-03-17, 06:59 AM
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'Crotchet' is not a misspelling. It's an archaic word that means hook. It's closely related to the word 'crochet', although the two words are pronounced differently.
Funny how they equate nonstandard terms as "fancy legal talk" when such can add to confusion on the part of the consumer and thus lead to issues associated with the use of the component.
05-03-17, 08:28 AM
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The front tire has a slight wobble (I've triple checked that it's seated correctly and the tube isn't pinched, remounted it and checked again), so when I saw that I thought maybe I was missing something. I believe the tire (or tube?) may have a defect but I'm done thinking about it.
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