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Squeezing a 28mm tire on a CF fork ??

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Squeezing a 28mm tire on a CF fork ??

Old 11-26-07, 08:55 PM
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CrossChain
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Squeezing a 28mm tire on a CF fork ??

I'm increasingly liking 28mm tires...at least for now. Me,the last-steel-holdout is also considering a cf bike for next year. Were I to buy a "standard" issue cf bike (Roubaix, OCR, Trek, etc.), what's the likelihood I could squeeze a 28mm tire between the fork blades...or use standard reach brakes for that matter?

(I realize this may be a Freddish question...like asking if I should wear green or brown argyles with my Sidis.)
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Old 11-26-07, 09:54 PM
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I did ask the guy where I got mine and he said 25mm was the biggest. I may try it with the Jamis wheel if the disk doesn't get it the way. I have a spare 28mm tire I may try that as well. I'll have to get back to you, I'm pretty busy for the next few days. Sometimes I wonder if I'm retired or not.
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Old 11-26-07, 09:59 PM
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Oh, I did take the tires off that came with the bike and I have 25mm 4 seasons on it now and they ride pretty good. I just came in from a spin around the neighborhood with the Jamis and you couldn't tell the difference in the ride. I never thought I would say this, but I just lowered the bars on the Jamis and they are now an inch below the seat.
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Old 11-26-07, 10:55 PM
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The first thing to go is the mind. I forgot I have 32mm on the Jamis.
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Old 11-26-07, 11:27 PM
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My LBS said that 700x28c's would fit on my '06 Roubaix but I have not tried it. I've used 700x25c's so I know they will fit with plenty of clearance.
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Old 11-27-07, 01:09 AM
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I think alignment is a big issue when you are at the limit of a bikes' brake clearance. I had a cannondale that should have held 28's, but couldn't because the rear triangle wasn't aligned...and like CF, you couldn't do any bending/tweaking with the aluminum.

A 650B conversion is another option
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Old 11-27-07, 01:37 AM
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I had a dean TiCarbon and used the Conti Contact 700cX28 on the bike. Tight but did clear ok. I think you will have to try it on a case by case basis. I will be putting the 28's on my Mondonico for winter riding.
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Old 11-27-07, 01:45 AM
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Originally Posted by Deanster04 View Post
I had a dean TiCarbon and used the Conti Contact 700cX28 on the bike. Tight but did clear ok. I think you will have to try it on a case by case basis. I will be putting the 28's on my Mondonico for winter riding.

Safe to assume an all around cycling versatility in older, more conventional road frames that weren't breathlessly pushed by the racing, hi performance image that, perhaps more than ever, sells and therefore influences bikes. No wonder there's a niche for Rivendell, Heron, Kogswell, etc.
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Old 11-27-07, 01:46 AM
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Originally Posted by George View Post
The first thing to go is the mind. I forgot I have 32mm on the Jamis.
LOL.......many of us are pretty mindless, George-- you fit right in. Thanks for your concern with my question.
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Old 11-27-07, 05:09 AM
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There was a Rivendell Reader article a while back giving a breakdown of several carbon and steel forks. I'll have to dig through the stack and see what I can find.
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Old 11-27-07, 10:18 AM
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I put 28s on my Pilot 5.0. The tightest spot was in the chain stays. There's still plenty of room. Wanna buy it?
BTW, I think the brown socks would go best with my bike.
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Old 11-27-07, 01:45 PM
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Originally Posted by CrossChain View Post
I'm increasingly liking 28mm tires...at least for now. Me,the last-steel-holdout is also considering a cf bike for next year. Were I to buy a "standard" issue cf bike (Roubaix, OCR, Trek, etc.), what's the likelihood I could squeeze a 28mm tire between the fork blades...or use standard reach brakes for that matter?

(I realize this may be a Freddish question...like asking if I should wear green or brown argyles with my Sidis.)
I run 23's so instead of guessing-I went down and measured the bikes

Clearance between space where the tyre runs

Giant OCR3
Front 4 cms
Rear 4 cms

Boreas
front 3.8 cms
Rear 3.1 cms.

Measure the width of a 28 on a standard rim and see if you have enough clearance.

Other thing I noted- on Boreas- I would not fancy fitting a taller tyre. There is less than 1 cm at present.
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Old 11-27-07, 05:07 PM
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I have 28s on my Roubaix, you just have to deflate them to get past the brakes.
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Old 11-27-07, 05:16 PM
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The other thing to watch is those little rubber sticks that come on new tyres - the moulding knobs or whatever they're called. They're only thin and wouldn't appear to cause trouble, but a number of members on my aussie forum have found they wear away the clear coat on carbon frames very quickly.

Richard
firmly in the Rivendel camp of 'traditional' and steel - does that make me an official retro grouch?
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Old 11-27-07, 05:26 PM
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I prefer 28s over 25s for fall & spring riding, generally use the MTB in winter. I have no problem with 28s on the front fork of 2 road bikes (forks = Kestrel EMS and Columbus Carve), but the rear tire is another story. Not a chance on my Calfee and 28s barely fit my new custom steel. All tires are not the same size, and 28s seem to have a tremendous variance in the height, so case by case is probably the best answer.
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Old 11-27-07, 09:23 PM
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Note: Not all 700Cx28 tires are created equal. My Specialized Turbos and Armadillos are a full 28mm wide, but the Continentals on my Bianchi are closer to 700Cx25. There is no way I could put a real 700Cx28 tire on either the front or the rear of the Bianchi, although I could just barely do it with my old Peugeot PKN-10, as long as I did not mind deflating the rear a bit to remove the wheel.

For general purpose riding, even with my club, I really like 700Cx28 myself, and that is what I have on the Capo, which probably has enough clearance for 700Cx35 tires. Tire clearance, ride quality, and appearance are just three reasons I passionately prefer vintage bikes over current offerings.
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Old 11-27-07, 09:58 PM
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I just Googled it and a few guys put 28mms on there Roubaix's.
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Old 11-27-07, 10:10 PM
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I just thought of something, the tires may fit, but will they fit on the rims?
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Old 11-27-07, 11:19 PM
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My concern with 28's is clearance problems: rubbing against either the brake bridge or the underside of the brake calipers on short reach (47mm) brakes. My old Superbe Pro's (47mm) stopped cold a Ruffy Tuffy which is nominally a hair less than 28mm. Good to know that the Roubaix has a carbon fork with the width and the brake set-up to accept 28's. I agree with John E. that tires are still not accurately labeled for width and not at all for height. Trouble is finding a mainstream fork that was designed for the versatility of standard (57mm) reach brakes. Hence, people turn to Rivendell, Surley, etc. The Hi Performance/Race concept is the wind that shakes the barley here-- as usual.

Thanks to all who've replied with their insight, experience, etc.

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Old 11-28-07, 12:04 AM
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Do this.

Pick the bike you like. Negotiate the best deal you can.
Take your favorite 28's to the shop.
Tell them you'll buy the bike if the 28's fit and work correctly.

I'll bet they'll put them on for free to see if they work.
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Old 11-28-07, 01:48 PM
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I have Continental Gatorskins, labeled 622x28, on my 2005 Roubaix Elite (all carbon fiber). Although they actually measure 26mm when inflated to 100psi, there is adequate clearance both front and rear for an additional 2mm of tire width. I actually inflate them to 80psi front and 90 psi rear. What a sweet ride!

Regards,
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Old 11-28-07, 02:29 PM
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Originally Posted by CrossChain View Post
The Hi Performance/Race concept is the wind that shakes the barley here-- as usual.
I have no idea what this means, but it's so wise and folksy, I simply had to respond...

Last edited by Big Paulie; 11-28-07 at 04:19 PM.
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Old 11-28-07, 03:43 PM
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Bike shop put 28's on my Scott Contessa, without doing any adjusting, they are alittle tight when I remove them from the fork, but it is not a problem. I am much happier with the 28's, I just feel more stable (not sure that I really am, still just a wreck waiting to happen). Now that I have written this, is it even what you were asking about?
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Old 11-28-07, 04:30 PM
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My wife has some cheapy Performance tires on her old Nashbar SIS (circa 1986). They're narrow tires, only 26+mm wide. I just swapped her front wheel to my IRO fixie with a Nashbar cheapy CF fork and it fit, no problem.

Yeah, I'm a cheapskate, but it's another datapoint.


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Old 11-29-07, 07:36 AM
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Cross Chain,
Looks as if others have noted the reality: every bike is different. My LeMond Buenos Aires will take 28s with room to spare, while my wife's Trek1500WSD barely has room to fit a 25 mm tire. Both of these bikes have CF forks. It is affected by the basic design of the bike and then each size of a particular bike has differences. There is no way to be sure without trying it out.
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