Tire slipping

General Discussion about electric bicycles.
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999zip999   100 GW

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Tire slipping

Post by 999zip999 » Mar 19 2020 6:08pm

Okay my tires slipping rolling the tire backward the tire in ripping the stem losing air in walking home.
I tried putting the tire to the rim with gasket cinch that seemed to work pretty good with a muxus gypsy. I I am now using a muxus 3000 4t powervelocity 15 fet @ 72v 50 amp. And now using a rhyno lite sun rim with rivets and 14/13 spam spokes. The tire is a serfas drifter and thick slim tube.
So The rim is a little Bent yes be t that hard and I'm thinking about grinding diagonal slots on the inside of the rim to hold the bead of the tire down so it won't slide and rip my stem off my tube crating a flat. Maybe with a compound wheel. It will pull the tire down. Yes just little ones. What's up ???

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fechter   100 GW

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Re: Tire slipping

Post by fechter » Mar 19 2020 6:55pm

Higher tire pressure usually helps. Also be sure there is no oily stuff on the rim or the tire bead.
"One test is worth a thousand opinions"

999zip999   100 GW

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Re: Tire slipping

Post by 999zip999 » Mar 19 2020 7:13pm

I got the stone grinding out I was going to make the rational slits very small ones but I decided all I need to do it just scuffed up that little bead area or the other falls over it makes a little hook beat

markz   100 GW

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Re: Tire slipping

Post by markz » Mar 19 2020 7:19pm

Try belt dressing/conditioner spray used for vehicles.

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motomech   1 GW

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Re: Tire slipping

Post by motomech » Mar 19 2020 7:37pm

Is the tube the correct size?
Here in Mexico I couldn't get a tube for my 2.40" tires and the tire would slip around a bit with a 1.95 tube. I had to glue the sidewalls to the rim.
Motomech


'07 GT Idive 4 4.0, Q100H 201 frt. mounted, 14S Multistar LiPoly, elifebike 9-FET 20A controller. Mean Well HLG-320H-54A, Crazy Bobs on Alex DM32's 21 to 22 MPH. viewtopic.php?f=3&t=28151&p=1373714&hilit=Idrive#p13737

999zip999   100 GW

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Re: Tire slipping

Post by 999zip999 » Mar 19 2020 7:56pm

I tried using belt dressing gasket cinch the one where the girl is falling over and her dress opens up and you can see her underwear on the can. It's like a contact cement you put it on let it dry then drop the tire . in there. It worked with the maxis Gypsy tire which I like very much but I have like three of these serfas drifter tires 26 v 2.0. and the thick slim tube.

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Re: Tire slipping

Post by 999zip999 » Mar 20 2020 3:27am

Kool will grind interior rim the bead tomorrow. Thanks And blet glue .

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Re: Tire slipping

Post by flat tire » Mar 20 2020 4:09am

What pressure are you inflating to?

999zip999   100 GW

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Re: Tire slipping

Post by 999zip999 » Mar 20 2020 1:54pm

I inflate the Tyre 45 to 50 lb or more . Hard.

markz   100 GW

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Re: Tire slipping

Post by markz » Mar 20 2020 8:06pm

999zip999 wrote:
Mar 20 2020 1:54pm
I inflate the Tyre 45 to 50 lb or more . Hard.
You may have to relace hub motor into a motorcycle/moped rim but only after trying other methods no doubt.
Or, relace into a bicycle rim, which you can install a motorcycle tire. Just options for ya buddy zip.

Belt Spray usage check
Tire Pressure high enough check
Correct tube size check

Maybe try to find a tighter fitting tire, like you know how some tires are super hard to get that last little bit up and over and seated onto the rim. Maybe your rims ERD is just too small.
I cant load the sun ringle pdf page for erd's.

999zip999   100 GW

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Re: Tire slipping

Post by 999zip999 » Mar 21 2020 10:18am

Yes the maxis Gypsy did slip less than the serfas. But I got ,3 free as they are 26in and my neighbor Only uses 27:5 or 29 and 26 is out of fashion as we all know.. As he owns a high end bike rental business.

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Re: Tire slipping

Post by markz » Mar 21 2020 7:38pm

26 is not hip anymore
Everyones going big or going home.
26 is fine with me!

999zip999   100 GW

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Re: Tire slipping

Post by 999zip999 » Mar 21 2020 8:37pm

Markz you should go to 27.5 and send me the out of date 26in Stuff. P.M. me for shipping address. Will pay for shipping. No worries. Lol
No 26in. spandex.

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Re: Tire slipping

Post by 999zip999 » May 27 2020 6:34pm

Challenge rim cement ? Does anyone use or know of this rim cement I think it's for road bikes but my tire slips at 5000 w on my 26 in bicycle rim that terrors my valve stem off.

markz   100 GW

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Re: Tire slipping

Post by markz » May 27 2020 7:07pm

999zip999 wrote:
May 27 2020 6:34pm
Challenge rim cement ? Does anyone use or know of this rim cement I think it's for road bikes but my tire slips at 5000 w on my 26 in bicycle rim that terrors my valve stem off.
Motorcycle/Moped rims have rim lock clamp

Maybe time to switch

Of course when you type in Rim Lock to the search engine, locks come up with a few motorcycle rim locks showing up as well.

999zip999   100 GW

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Re: Tire slipping

Post by 999zip999 » May 27 2020 7:13pm

I'm going to buy the em3ev 3,000watt 17in moped rim 3t.

markz   100 GW

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Re: Tire slipping

Post by markz » May 27 2020 7:27pm

999zip999 wrote:
May 27 2020 7:13pm
I'm going to buy the em3ev 3,000watt 17in moped rim 3t.
Hopefully its in stock soon.

https://em3ev.com/shop/3kw-rear-direct-drive-hub-motor/
17" Moto Wheel Build With 10 Gauge Moto Spokes
Moto Wheel Build 17" (1.6" wide) Moto Rim and Spoke Build
$0.00 (USD)

Out of stock

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MadRhino   100 GW

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Re: Tire slipping

Post by MadRhino » May 27 2020 9:15pm

Solutions:

Build tubeless, with a bicycle tubeless kit for your tire size. Add a foam insert, to make it virtually flat proof.

Use a bead lock. There are some small enough for 2.5 bicycle tires. Check for the small plastic ones on Amazon.

Grip It, automotive belt dressing. Or dish soap if you are not in a hurry, it does help mounting tires and dry sticky enough in 3 days.

Buy better tires. Dual or triple compound DH racing tires, grippy, sticky... made for riding fast and hitting hard.
Make it fool-proof, and I will make a better fool.
Current bikes
Street:
Trek Session 10 mod. Variable geometry. 70mph
Dirt:
Santa Cruz V10. 50mph

markz   100 GW

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Re: Tire slipping

Post by markz » May 27 2020 9:33pm

Tubeless tires do fit much tighter, they have to.

I've never seen a bead lock for bicycle tires, its common for offroad SUV/Truck applications.
Example https://dv8offroad.com/products/dv8-off ... ock-wheels

Bead bolt for motorcycle/moped rims
https://kiwav.com/kiwavebay/product/04/ ... nge-01.jpg

Saying that
https://forums.mtbr.com/general-discuss ... 79062.html
I have modded my carbon rims from light-bicycle.com to make them less prone to burb when setup tubeless and thought I would share it. I have increased the bead seat diameter and added bead locks inspired by the bead lock from the american classic and derby rims.
The rims that i modded are discussed here:
forums.mtbr.com/29er-components/cheap-chinese-carbon-rims-673410.html


Before I made this modification I could make a 2.25'' tire burb at pressure below 2bar during aggressive riding. I weigh 84kg. Now the tire does not even burb at 1bar which is significantly lower than what i want to ride on. The added weight is 15gram per wheel and the tires are much easier to mount than with the bontrager strips which are 40gram per wheel.

I did the following to make the applicator tool:
- Oil on the rim
- Put fast curing plastic padding to take a cast of the rim profile. The oil makes it easy to remove again. I put in a small handle.
- On the applicator tool I grinded the bead seat area approximately 1mm down and cut a slit groove (the bead lock/bead bulge)

I did the following to apply the silicone:
- Covered the spoke holes with a narrow tape.
- Applied a "construction silicone" (I am not sure what it is called in english). It is only arround 5$.
- dragged the "mold" along the rim.
- Let it dry
- Clean/take off excess material
- Put on tubeless tape

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