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Clydesdales/Athenas (200+ lb / 91+ kg) Looking to lose that spare tire? Ideal weight 200+? Frustrated being a large cyclist in a sport geared for the ultra-light? Learn about the bikes and parts that can take the abuse of a heavier cyclist, how to keep your body going while losing the weight, and get support from others who've been successful.

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Old 03-30-07, 10:29 PM   #1
Diablo Rojo
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Newbie Tire Question

I have a Trek 2300 with Bontrager Race X Lite, 700x23c tires. I have been riding them with the tire pressure at 105 per the LBS. The tires are going flat on me on a regular basis, so I want to switch to the Continental Ultra Gatorskins.

I want to go to the 700x28c tires. Will these tires fit the Bontrager Race wheels that came with the bike or are they too wide?

My data: 6.1 at 300lbs.
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Old 03-30-07, 10:46 PM   #2
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Sheldon Brown, of course, has the answer:

no, it's not a good idea unless you have a 17 mm inside measure rim.

See the chart on this page toward the bottom for rim width and tire size.
http://sheldonbrown.com/tire-sizing....re-sizing.html
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Old 03-30-07, 11:05 PM   #3
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Bontragers are terrible in my opinion. I had 'em on my Lemond Tourmalet. Sidewalls split during a cnetury, the second one a week later. Both split at the sidewalls totally thrashing the tires. When I bought my wife's bike, I took the tires off even before it left the showroom floor.

I bet you'd be fine with 25's. Especially a thick rubber tire like one from Specialized. I've tried Conti Gators on my tandem and they are the worst I've had,but that's 400lbs total rider weight. 6 flats,different tires,3 weeks.

Not as heavy as you at 230, but I've had best of luck at $25 model Continentals. $35-$40 models too much of a race tire and rubber is too thin.
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Old 03-30-07, 11:30 PM   #4
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Sheldon Brown knows everything, but I think he's too conservative here. I've run tires from 19mm to 40mm on several sets of wheels and never had a problem. My singlespeed is running 700x38 Nimbuses right now on skinny rims that came off my wife's old Bridgestone. I doubt those tires will fit on your bike, but I don't think you'll have trouble with the rims.
What you need to do, though, is find out why the tires are going flat. Are you getting snakebites, or punctures in the inner side of the tube from a spoke nipple, or could there be a thorn or piece of glass stuck in the tire? I'm not close to your weight now, but I've been as high as 270, and I'm pretty sure you're not just squeezing out the air. There's something wrong, and until you find out what it is, you'll keep having flats. See if there's any pattern to it (repeated holes in the same spot on the tube, for instance) and address the problem.
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Old 03-31-07, 06:19 AM   #5
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Quote:
Originally Posted by Diablo Rojo
I have a Trek 2300 with Bontrager Race X Lite, 700x23c tires. I have been riding them with the tire pressure at 105 per the LBS. The tires are going flat on me on a regular basis, so I want to switch to the Continental Ultra Gatorskins.

I want to go to the 700x28c tires. Will these tires fit the Bontrager Race wheels that came with the bike or are they too wide?

My data: 6.1 at 300lbs.
Going flat ON rides or between rides?

If they are going flat between rides, it could be just normal air leakage over time. Contrary to popular belief, bicycle tubes are not 100% air tight, the higher the pressure the more leakage occurs, some high pressure road bike tires can go from 6 Bar to 4 Bar in as little as 3 days. The solution is a good floor pump, and just top them up between rides. You could also have a slow leak, best solution is to get a tub or bucket full of water, pump the tires up to plump, but don't blow them up beyond about double the tire size. Now place part of the tube under water, and check for bubbles. Check the valves as well, valves, especially Schraeders can stick partly open, causing a leak. The leak will appear as a series of air bubbles escaping, once you find it, mark it, and keep checking. Your not done until the entire tube is wet.

There are two options, replace the tube, or patch it, I always carry at least one spare tube, when on the road, so I can swap a punctured tube for a good one, then patch them at home, once a tube is patched, and has sat for 24 hours, for the glue to set up 100%, I give it the bath treatment again, to make sure the patch is or patches are good. Then I roll it up, and it is added to the spares, since tubes are fairly cheap, you can keep a few spares. Some folks will hang the punctured tubes in the garage, and when they get a bunch will patch them as a batch, rather then one at a time.

When you swap tubes, there are a bunch of checks to do, first take something like a facial tissue, or some toilet paper, and run it along the inside of the tire, it will catch on anything poking through, check the entire tire from bead to bead, I have seen where something pokes through the sidewall, which is usually thinner. Check that the rim strip is centred on the rim, that it fully covers the screw heads, and that there are no holes in it, other then the one for the valve. Check the rim for cracks or sharp edges, if you see a small crack in a rim, then, you can probably ride home with it, providing it's not too far, and the crack is very small. Replace the rim before riding again, catastrophic rim failure is not something you want on the accident report at the coroners office
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Old 03-31-07, 07:20 AM   #6
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Quote:
Originally Posted by Diablo Rojo
I have a Trek 2300 with Bontrager Race X Lite, 700x23c tires. I have been riding them with the tire pressure at 105 per the LBS. The tires are going flat on me on a regular basis, so I want to switch to the Continental Ultra Gatorskins.

I want to go to the 700x28c tires. Will these tires fit the Bontrager Race wheels that came with the bike or are they too wide?

My data: 6.1 at 300lbs.
I would bet you are getting pinch flats. You weigh to much to be running that low pressure. I would try running 130 in the back and 120 in the front. As you lose weight then you can start reducing pressure. That is what I did. I ran 130 and 120 when I was at 303 last year. I am now at 260 and I run 120 and 110. The other thing is if you are running at 105 are you putting air in them everyday? If not then you are losing pressure and runing less then 105.
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Old 03-31-07, 11:28 AM   #7
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i'm a big guy that rides on crappy roads, and I have had great success with the Armadillo in on the back, and what ever is on special on the front.

For the record I'm 5'9" 270lb. and run 120 in the back and ~110 in the front
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Old 03-31-07, 01:03 PM   #8
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gatorskins and armadillos handle something awful the sidewall is super flat and the tread doesn't roll into it at all so you cornering stinks I run vredestien ricorso 700x23 at 130psi works great ont he gaping railroad crossings in my city= snakebit central
also I would look at getting a set of vittoria randonneur tires the cross version has very nice tred and handles quite well as well as being tough as nails
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Old 03-31-07, 06:29 PM   #9
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Quote:
Originally Posted by Diablo Rojo
I have a Trek 2300 with Bontrager Race X Lite, 700x23c tires. I have been riding them with the tire pressure at 105 per the LBS. The tires are going flat on me on a regular basis, so I want to switch to the Continental Ultra Gatorskins.

I want to go to the 700x28c tires. Will these tires fit the Bontrager Race wheels that came with the bike or are they too wide?

My data: 6.1 at 300lbs.
I have the Bonty Race Lites and I am using the Race Lite Harcase 700x28 and they work great. I do ride with them at 120 psi and I've never had a pinch flat, nails....that's another subject.
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Old 03-31-07, 07:44 PM   #10
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I'll admit I'm biased here. Gatorskins 700X25 got me from 6'4" 297lb to 236lb with no flats pinch or other the entire time.
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Old 03-31-07, 09:30 PM   #11
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yeah you obviosly haven't taken a corner low and fast on em and landed on your hip because of em either
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Old 03-31-07, 09:33 PM   #12
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Quote:
Originally Posted by tourist
I'll admit I'm biased here. Gatorskins 700X25 got me from 6'4" 297lb to 236lb with no flats pinch or other the entire time.
That's the plan!!!!! Thanks to everybody for the replies. This is a great site!
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Old 04-01-07, 08:28 PM   #13
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Quote:
Originally Posted by Retem
yeah you obviosly haven't taken a corner low and fast on em and landed on your hip because of em either
Point taken. This is a TRAINING tire. And they do have draw backs. I've never personally had this happen, but I'll agree the Gatorskins do have the ability to slide out. But, for puncture resistance, I'm all in.
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Old 04-01-07, 09:37 PM   #14
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VeloCity Road Deep V Road Wheelset

I am going to replace the wheels also. I am going to order the VeloCity Road Deep V Road Wheelset
from http://www.bikemania.biz/VeloCity_Ro...city_deepv.htm.

Hopefully, this combined with the 25 Gators will last a little longer for me. Are the Deep V's complete wheels or is there anything else I need to order?
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Old 04-01-07, 09:46 PM   #15
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They look like complete wheels. I would highly reccomend the 32 spoke front and rear version. Deep V's are bomb proof rims. Great choice.
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Old 04-01-07, 09:54 PM   #16
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Quote:
Originally Posted by Retem
armadillos handle something awful
they're not nicknamed "Black Ice" for nothing. if anyone thinks i'm joking, try them in rain, but make sure your life insurance is paid up before you start the ride...
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