Mag Trainer shredded my tyre!

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Mag Trainer shredded my tyre!

Postby wayno » Thu Jul 31, 2008 8:44 am

Just got me a mag trainer and had a second go at it last night. After a 25min session my rear tyre was shredded to bits, I mean totalled!! This is a 2000km old Pro 2 Race tyre and had plenty of life still in it :(

What is the cause of this? Too much pressure from the roller? Tyre pressures too low? Other?

I've swapped out front and rear tyre and will test your suggestions tonight. I do not want to shred my brand need Pro 3 Race tyres that I have been forced to use

Thanks.
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by BNA » Thu Jul 31, 2008 9:31 am

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Postby gsxrboy » Thu Jul 31, 2008 9:31 am

It will be a pain in the arse, but you will need to buy a dedicated trainer tyre, something that is a harder compound and get used to swapping the tyre over or even get a spare wheel. It's pretty much the heat generated by it all that will do the eating. The prorace (which I also have on mine) are a stickier (therefore) softer compound and a trainer will gobble them up a whole lot of nasty. I got my first trainer two nights ago, 2nd hand, but decided on a rim drive jobbie so I didnt need to change tryes/wheels.

You could maybe button off the pressure 1/4 of a turn and see how that goes, but then be careful of the tyre spinning.
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Postby MJF » Thu Jul 31, 2008 11:17 am

Continental makes special tyres for use on trainers.

Here is the MTB version, you should be able to find a road version as well.
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Postby wayno » Thu Jul 31, 2008 12:36 pm

Thanks for the advice, I think I am going to try and old rear wheel and cassette (10 speed) with trainer tyres and hope it works. Otherwise I am going to have to change the tyres every time I need to use the trainer :shock:
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Postby MountGower » Thu Jul 31, 2008 12:48 pm

Trainers are hard on tyres, but this sounds severe to me. I run 90-100psi on the trainer and adjust the wheel so it is only just enough to stop it slipping. I have old tyres and a dedicated old bike I bought for $60, but am still using the first tyre, which was already worn out.

I'm sure this situation will improved with a little attention the the set up.

Happy spinning.
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Postby sogood » Thu Jul 31, 2008 12:54 pm

It's the heat that kills. Up the tyre air pressure and reduce contact force would help. Trainer specific tyre works but would ideally have a spare wheel for the job.
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Postby wayno » Thu Jul 31, 2008 1:53 pm

I had the roller on pretty tight so there would be more friction :shock:

I guess thats the problem. I'll post some photo's when I get home. There is severe damage to the tyre. I guess I'll just spin.
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Postby rustguard » Thu Jul 31, 2008 10:48 pm

I got a interrim trainer, but the v-belt on it is a bit worn and I'm going to get one sometime. I want to get one online but cant find anything from minura. anyone know where i can get one from?
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Postby moosterbounce » Fri Aug 01, 2008 9:48 pm

i went for a different wheel with an old conti race tyre on it. tyre is still fine after about 1000kms (well, as good as it was when it went on!!).

Personally, I don't like the pro race tyres. Mr Moo had them on his ocr and they didn't last at all (about 1500kms). I've had better luck with Conti's.

Anyhoo...pick up another tyre and it will save you. Of course, you could dedicate yourself to changing tyre on Monday, riding the trainer all week, then switching for weekend rides. It works, but will annoy. :)
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Postby toolonglegs » Fri Aug 01, 2008 10:13 pm

sounds weird to me...i ride my normal trainer bike on the mag trainer with normal tyre...don't get any more wear than riding on the road...probably less with out the stones!.
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Postby wayno » Fri Aug 01, 2008 10:55 pm

moosterbounce wrote:i went for a different wheel with an old conti race tyre on it. tyre is still fine after about 1000kms


Third time lucky! I put on together a set of old crappy tyres, cassette and rear wheel an it works fine ie no shredding.

Check the photo its pretty severe shredding! Last night I used the front pro2race tyre with not too much pressure from the roller and the tyre started melting on the roller!
Image
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Postby gsxrboy » Fri Aug 01, 2008 11:19 pm

Far out, you must pedal like a flippin demon !


:twisted: :twisted:


:) :D :P

*leaves thread after not contributing anything more useful than I did before*
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Postby Deanj » Sat Aug 02, 2008 9:01 am

Thats strange, I use pro2 race tyres and have no problem. Done about 12 hours on the trainer in the last 2 weeks with a tyre thats got 4000kms on it (just swapped it to the rear from the front) and its been fine. Done some hard riding on it also in those hours including spinervals dvds where I gave it everything.

Have you checked the roller part where it makes contact with the tyre to make sure theres not something wrong with that? Its all I can think of.
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