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Squared of trainer tire: safety on road?

Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Squared of trainer tire: safety on road?

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Old 03-05-05, 07:24 AM
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Crack'n'fail
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Squared of trainer tire: safety on road?

So, I just moved recently, so everything is everywhere.

We've had some pretty nasty weather lately and I just had my observation by the state department of education, so i've been confined to indoor riding for a while now.

Well, with my observation out of the way and a rare day of spring like weather in the ohio river valley, I raced home and had to hop on the bike and get outdoors.

Well, as daylight is racing away from me, I'm tearing the house apart looking for my road tire, because the trainer tire is squared off from hours of use. Finally, I gave up, I was losing time and ride time is precious. So Just hopped on the squared off tire and hit the road.

What's the safety issues with that? Is it dangerous? Or are you just more likely to flat because of the excessive wear to the tire?
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Old 03-05-05, 09:24 AM
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iowarose
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Get a new tire ASAP. Cornering/steering, esp. in wet weather, will take you down quickly.
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Old 03-05-05, 09:27 AM
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Originally Posted by iowarose
Get a new tire ASAP. Cornering/steering, esp. in wet weather, will take you down quickly.
Rear tires get squared off riding them on the road. That's how they wear.
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Old 03-05-05, 09:34 AM
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One could say that the process is accelerated on the trainer. I'm speaking from (foolish) experience.
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Old 03-05-05, 10:04 AM
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Originally Posted by iowarose
Get a new tire ASAP.
Originally Posted by sydney
Rear tires get squared off riding them on the road. That's how they wear.
Originally Posted by iowarose
One could say that the process is accelerated on the trainer.
Based on the feedback that I got recently from a trained bicycle fitter (BTW, her store has several Computrainers that they rent time on) about my squared off rear tire, I believe that all these comments are substantially correct. As a result, I've bought a new set of tires that I'm going to install real soon now
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Old 03-05-05, 10:16 AM
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In all honesty, I would be worried about it only if the road conditions were really bad. If my rides aren't "too" long or out of the way where you could be stranded, then I have a tendnency to ride tires until the center layer is just about gone. That's what that main center layer of rubber is for, to wear.
Another option is to get an older training rim of no extreme cost or importance for about $80 or so, and slap on a cassette that is compatible, along with your training tire, and just use that on the trainer, instead of what you use on the road.
I am thinking of doing the same when and if I decide to rebuild my old bike I use on the trainer now.
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Old 03-05-05, 10:31 AM
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I always wanted a dedicated bike for my trainer...so when I bought my new Trek..my old lugged steel Moser was relegated to the trainer. Now I always have a bike mounted on the trainer. I simply get on and start pedaling. No wheel swaps or skewer swaps or anything like that. When I want to ride outside I simply grab the Trek and go.... So I strongly recommend a dedicated trainer bike if you can pull it off. You could probably get one for a few hundred bucks by buying a low end used road bike. Perhaps ebay would be a great place to start. I have an old Giant 'Comfort' MTB bike...which had a suspension seat post and cushy saddle. I put those on the Moser trainer bike...so it is now ultra comfortable...which is important since trainer time can be such drudgery. My wife even uses this set up as her home gym. She put's on the iPod and spins away!
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Old 03-05-05, 10:36 AM
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I have a full set of DA16 wheelset that I use on the trainer... and also for training... it makes life a whole lot easier for training...
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Old 03-05-05, 10:46 AM
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there's nothing like new rubber, but I agree with Sydney. You be the judge on how worn is worn and when the flat spot is too flat.

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Old 03-05-05, 11:00 AM
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In cornering situations, especially on wet pavement, a squared-off tire presents a certain danger. A few weeks ago, I crashed when I took a corner a bit too quickly on tires that were worn out from a winter's worth of time on a trainer. I don't have any doubt in my mind that if I were out riding on good rubber, I'd have an unscarred thigh.

But scars are cool and stuff.

Crack'n'fail...where in Cincinnati do you live?
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Old 03-05-05, 12:40 PM
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Originally Posted by Doctor Who

Crack'n'fail...where in Cincinnati do you live?
The Anderson area.
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Old 03-05-05, 12:58 PM
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I've ridden all winter on a set of Michelin Pro's on the trainer - about 800 miles. I rode outside for the first time last weekend for 50 miles and didn't notice any difference to be honest. Cornering, sprints ... all felt the same. Having said that, the tyres were new when I threw them on for the trainer (well, I had about 300 miles on them is all).
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Old 03-05-05, 01:02 PM
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After my crash with the trainer tire (less than 1 mile from home, BTW), I did go the route of having a rear wheel specifically for the trainer - changing wheels is a lot easier and quicker than changing tires, especially when you want to get out on the road. It's also harder to misplace a wheel.

Of course you should be the judge when it comes to using the trainer tire on the road. "Squared-off" sounds like an angle to me, however. So I would tend to err on the side of caution.

I would also guess that tire wear on the road is a bit more even than on the trainer, since in general (I'd hope) you're not doing much steering on the trainer - just the regular contact area with the trainer on the rear tire. With my trainer (Minoura Hypermag Alu), unless you have the flywheel set just right, there will be sizeable rubber flakes coming off the rear tire. Just another vacuuming opportunity, I guess.
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Old 03-05-05, 06:22 PM
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Keep your riding and trainer tires separate. Why add that worry when riding? Why take a risk like that? Hmmm, save 30 bucks or so and take a chance at a crash when you could get injured and miss cycling time? Not worth it.
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Old 03-05-05, 06:59 PM
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I'm not worried about the money, i'll buy a new tire if I don't find the brand new one that's laying around my house somewhere. I just wondered what kind of risk I had put myself into with my impatient trip the other day.
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Old 03-05-05, 10:23 PM
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Coincidentally, I went on a group ride this morning (38 miles only) using my "flat square" trainer-worn tires, pretty much out of laziness because I got up late and didn't have time to swap them for the new ones. Gotta point out that both of them are square, front and rear.
My experience, I noticed some rolling resistance, specially on the hills plus road buzz which I don't experience with new tires; other than that it was fine, weather was dry, so I can't on wet conditions, but I'd assume it would be dangerous like some said.
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Old 03-10-05, 03:15 PM
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Is it OK to use the skewer that somes with the trainer when riding outside?
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Old 03-10-05, 03:31 PM
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Originally Posted by miguelb
Is it OK to use the skewer that somes with the trainer when riding outside?
I do it.
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Old 03-10-05, 03:32 PM
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Originally Posted by oneradtec
I always wanted a dedicated bike for my trainer...so when I bought my new Trek..my old lugged steel Moser was relegated to the trainer. Now I always have a bike mounted on the trainer. I
That's exactly what I'm going to do this summer when I buy my Roubaix Pro. The Ironhorse will stay on the trainer.
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Old 03-10-05, 03:46 PM
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Originally Posted by Crack'n'fail
I'm not worried about the money....
Damn state worker!!
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Old 03-10-05, 04:28 PM
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Originally Posted by celticfrost
Damn state worker!!


Not because I make a ton (I am a first year teacher you know.)

But I do all right and my wife is a dietician. We also don't have a lot of debt.

As a side note, I did find my tire and I have commited to riding out doors from here on out.
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Old 03-10-05, 04:36 PM
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When to change rear tire?

In my case a 28 Conti Gatorskin only 1800mi, but very squared off.

What is the rule of thumb for replacement?

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