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Old 12-17-07, 03:12 PM   #1
golazo
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Currently have 700 x 28c road tires, where can I go from there?

To all, first of all, my sincerest apologies. I feel guilty in asking this straight out because, well, I don't want to seem leechy. However, I have done a decent amount of research both here and elsewhere, and short of calling my LBS (I'm almost embarrassed to go in there now after last week's "problem" with my chain that took me two weeks, both of which I spent with grease under my fingernails (couldn't get it out for the life of me) to attempt to fix and took the bike mechanic 30 secs--literally!--to aaaeeehhhmmm..."solve").

If you've read this far. Thanks. Obviously, I am new. Not so new to riding, but new to riding right, that is, with actual knowledge of what the heck I am riding and why it does what it does. In short, I want to learn and eventually, I plan on sticking around, become a true enthusiast. Like most here.

Here it is: I have a Marin Point Reyes Hybrid/City bike. MTB'like frame Road'like speed and tires. I love it because it is a pricey ride that I really couldn't afford now during my college-student years--but I did tons of research and got lucky on a great deal, otherwise I would be riding something from Wal-Mart . It has 700x28c (28 622) that desperately need replacing. Problem is I don't know what to look for in terms of sizing. I mean I know I should get tires for a 700 size rim, but the rest is all foreign to me now. Can I get a 700 x 35c Tire for my bike and have it fit? Also, can I get the aggressive tread pattern like a cyclocross tire. Will this help me grip the road more in this semi-snowy Northeast winter. How much speed will I lose? The current slicks are pretty fast, which is great, but only in the summer.

In advance much thanks to any and all of your responses. Cheers!
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Old 12-17-07, 04:08 PM   #2
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Look here: http://sheldonbrown.com/tire-sizing.html

further down the page it talks about width considerations. Since your bike is a hybrid I'm guessing the rims could handle 35 or 37s. You can find studded tires in those sizes that are good on ice and compacted snow. Knobbies help in loose snow. Reducing tire pressure significantly helps too.
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Old 12-17-07, 04:19 PM   #3
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Your fit issue is probably going to be more related to how much clearance you have beteen the tires and the frame/fork than wether or not a given tire size will fit on the rim. I am currently running 35m tires on mavic open pro rims with no problems. In the summer I run 23m racing tires on those same rims. So a given rim can give you a lot of range for tire sizing.

I am unclear about what you want...do you want a bigger size? Smaller? Smaller should not be a problem. Bigger might be if your current tires are almost rubbing on the frame or fork in places. Could you show pictures of the current tires/wheels relative to the brakes and chainstay bridge (the tightest places for fit)?
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Old 12-17-07, 04:49 PM   #4
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I don't find any advantage in running a MTB style tread in the winter. No extra traction, and they are slower and heavier. I run Ultra Gatorskins or studded tires.
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Old 12-17-07, 07:05 PM   #5
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Originally Posted by Sawtooth View Post
Your fit issue is probably going to be more related to how much clearance you have beteen the tires and the frame/fork than wether or not a given tire size will fit on the rim. I am currently running 35m tires on mavic open pro rims with no problems. In the summer I run 23m racing tires on those same rims. So a given rim can give you a lot of range for tire sizing.

I am unclear about what you want...do you want a bigger size? Smaller? Smaller should not be a problem. Bigger might be if your current tires are almost rubbing on the frame or fork in places. Could you show pictures of the current tires/wheels relative to the brakes and chainstay bridge (the tightest places for fit)?

Sorry I am really unclear on this stuff too, for now! Never thought getting tires would be seemingly so difficult.

What I want is this: http://cgi.ebay.com/KENDA-HYBRID-CYC...QQcmdZViewItem

Why? Because they are cheap and I could afford them. In addition, they have reflective walls, and this from what I have read is a great safety addition--I am planning on night riding. Also they have a nice tread pattern, and I thought this would give me more grip, but since they are still skinny tires, they will not be that much slower than my current slicks.

What I am really confused about is that 23m, 28c, 40c, thing. Basically, can i get a 700x40c tire to replace my current 700x28C's? It seems you are saying this will depend on clearances, space, etc, but can generally speaking a 40C tire fit on a bike that currently has 28C? This is what is confusing.

Sorry that I can't upload tonight. But will tommorow. What should I look for? Which clearances specifically? Thanks a ton!!!

Thanks for all of your help!

Last edited by golazo; 12-17-07 at 07:12 PM.
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Old 12-17-07, 07:35 PM   #6
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I run ultragatorskins or Vittorias (came on my Schwinn DBX). I switched back to 25s from the 28s. Didn't see a big difference in bike performance or handling and tubes are cheaper.
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Old 12-17-07, 07:36 PM   #7
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Quote:
Originally Posted by golazo View Post
What I am really confused about is that 23m, 28c, 40c, thing. Basically, can i get a 700x40c tire to replace my current 700x28C's? It seems you are saying this will depend on clearances, space, etc, but can generally speaking a 40C tire fit on a bike that currently has 28C? This is what is confusing.

Sorry that I can't upload tonight. But will tommorow. What should I look for? Which clearances specifically? Thanks a ton!!!

Thanks for all of your help!
In the tire size numbers the 700 refers to rim diameter. It's not actually 700mm but all modern '700' size tires fit on modern '700' size rims. The 28c, 35c, 40c, etc. refers to the width of the tire at its widest point once inflated and there's a lot of variation between manufacturers with the same width so consider it more of a guide rather than an accurate measurement.

So, the answer is yes, any modern 700 by XX tire will fit on your wheel. The issue you need to concern yourself with is if the inflated tire will fit in your frame. That will be the limiting factor in terms of maximum width. For general commuting duties I find a decent quality 700x28 slick like the Continental Ultra gatorskin to be just fine. Personally I don't like the sort of tire like the Kenda you linked to as I can really notice the extra drag and weight.
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Old 12-17-07, 08:04 PM   #8
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Awesome, thanks Cyclaholic! I thought the extra tread would help out in the snowy winter after-mess that happens, here in No.East USA. Most of the road are generally cleared after and salted, therefore, Ice seldom appears (I hope!). I think I will feel the extra drag from an aggressively treaded tire as well, I remember the first thing I loved about my current Continental Supersport's was the fact the ride felt fast!

I will now look for 700 x XX tire with reflective walls, hopefully some 28 new slicks as I am sure they will fit!
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Old 12-17-07, 08:35 PM   #9
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Originally Posted by golazo View Post
To all, first of all, my sincerest apologies. I feel guilty in asking this straight out because, well, I don't want to seem leechy. However, I have done a decent amount of research both here and elsewhere, and short of calling my LBS (I'm almost embarrassed to go in there now after last week's "problem" with my chain that took me two weeks, both of which I spent with grease under my fingernails (couldn't get it out for the life of me) to attempt to fix and took the bike mechanic 30 secs--literally!--to aaaeeehhhmmm..."solve").
Been there, done that. You should fuggetaboudit and build that good relationship with your LBS. Believe me, the advice they give will be solid and you'll be happy (not that you won't get good advice here, too, but don't avoid the LBS because you're embarrassed.)

Hey, look how fast he solved your chain prob!

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Old 12-18-07, 12:15 AM   #10
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I'm no expert at this, but I checked the Mavic website when I purchased my wheels. My touring bike came with Mavic A319's. I wanted to run a lighter wheel/rim in the summer. The website has recommended tire widths for each rim. The recommended tire widths for the Mavic Open Pro (the rim that I use in the summer) are 19mm to 28mm. The recommended widths for the A319's is 28mm to 47mm. My touring bike will accept up to a 50mm tire.

I'm not sure what the purpose of these recommended widths are. Are they a safety concern? Or just a "performance" recomendation? Either way, I ride a 28mm Continental 4 seasons on whichever wheel/rim that I'm using.
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Old 12-18-07, 03:58 AM   #11
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I'm not sure what the purpose of these recommended widths are. Are they a safety concern? Or just a "performance" recomendation? Either way, I ride a 28mm Continental 4 seasons on whichever wheel/rim that I'm using.
The tyre width recommendations are based on the width of the rim. Basically you need to avoid thin tyres on wide rims and vice versa.

Sheldon explains it best:
http://sheldonbrown.com/tire_sizing.html#width
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Old 12-18-07, 06:04 AM   #12
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Your wheels are unlikely to be the limiting factor, rather your frame/fork sizing may be. The link shows a 700x40c tire, that's too wide for road bikes, fairly wide for a hybrid, however, a cyclo cross should be able to handle it just fine. Go online and check the spec's for your ride, they should give you a range of tire sizes that will fit. All things being equal, wider=slower and narrow=faster, bigger tires, however, will provide better traction on loose gravel, wet pavement, off-road, snow. A bigger tire also has a bigger profile which may be more appropriate for comfort, shock absorbtion, flat prevention (less likely to pinch flat), for city riding, etc. Of course handling characteristics will change from tire to tire. Then there's tread pattern and compound. Many of the cyclo cross tires, IMO, are perfect for all weather commuting. Sure, they're slower than a slick in 700x23, but they provide the advantages listed above, while offering moderate speed with appropriately sized and spaced knobbies. I road my last set for a year in dry conditions, rain, off road, snow, and recently even of hard packed snow and ice, without problem. I only had to replace due to wear.

Find what fits your bike and experiment, that's really the only way to find out.
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Old 12-18-07, 06:05 AM   #13
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Originally Posted by golazo View Post
Here it is: I have a Marin Point Reyes Hybrid/City bike.

It has 700x28c (28 622) that desperately need replacing.

700's on a Point Reyes? They come with 26"s. Are you sure of the model,or did someone swap the wheels?

In any case,I have a Point Reyes,and had a Fairfax. Marin seems to be pretty good about building their bikes for the real world. Going up to wider tires shouldn't be a problem,just measure from your tire to your chainstays,seatstays,and fork legs to see how much room you have. As for running treaded tires,they help alot when riding through winter slop and snow. I hate cross tires because the side knobs make high speed turning unsettling,and they usually don't have puncture protection. If you're running 700cc wheels,I'd recommend Specialized Infinitys or Crossroads in whatever size you can get to fit.
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Old 12-18-07, 06:54 AM   #14
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Here's a suggestion. Since you are already running 700x28 tires on your bike, get some the same size to replace them. I would recommend Panaracer Pasela TG Kevlar tires, which are available in 700x28 and larger sizes as well, such as 700x32. The larger tires might give you a slightly kooshier ride, but that has a lot to do with tire pressure. That is, you can run larger tires at lower pressures. Anyway, the Paselas are very durable tires that are flat resistant, with a little bit of tread, and reasonably light. In the 28s, Paselas TGs weigh less than 300 grams, which is pretty light. Just make sure you get the ones with Kevlar beads; the wire bead versions will cost a little less but weigh much more. Paselas are pretty easy to find for $30 each, and for $25 or less if you shop around.
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Old 12-18-07, 08:32 AM   #15
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I had good results with the Continental Stradius tires - slick centerline, a little bit of tread on the sides and a reflective sidewall. Got well over a thousand miles without flats, too, till I sold the bike they're on.
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