Should I blow $160 on Compass 28mm Chinook Pass tires for my 1987 Bianchi?
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The bike looks great with the new tires. Judging by the small pic on my phone the rims appear to be H Plus Son TB 14s, yes? I’m curious what the measured tire width is on those (wider than vintage) rims. I have the same to go on a bike that should just fit a 28 mm true-width tire. Rubber is currently undecided.
BTW, I use Stan’s rim tape and can often get those tires on and off without tools, or with just a bit of initial assistance coming off. They can be a slightly tight going on when brand new, but nothing dramatic is required.
Last edited by Dfrost; 05-18-18 at 04:49 PM.
#152
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It must be rim specific. On my H+Son rims the Bon Jons practically mounted themselves. I was actually a little concerned about the loose fit until I aired them up. The bead seated itself, uniformly, without any manual manipulation required, at exactly max pressure listed in the tire. Pretty much an effortless process.
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I use both Compass Stampede Pass 32’s and Chinook Pass 28’s on 23mm wide tb14’s. After the first few hundred miles, they measure 33mm (65/75 psi) and 29mm (75/85 psi), respectively, at those pressures.
BTW, I use Stan’s rim tape and can often get those tires on and off without tools, or with just a bit of initial assistance coming off. They can be a slightly tight going on when brand new, but nothing dramatic is required.
My experience with (much larger 38 and 42) Compass tires has been that they go on easily using hands only on Velocity Synergy rims. Some tire/rim combos are just easier.
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It must be rim specific. On my H+Son rims the Bon Jons practically mounted themselves. I was actually a little concerned about the loose fit until I aired them up. The bead seated itself, uniformly, without any manual manipulation required, at exactly max pressure listed in the tire. Pretty much an effortless process.

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#155
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My klunker currently has 559 x 54mm tires. They are 100% bald slicks so they are smooth and quiet. But, they are wire bead with very thick sidewalls and tread, so they are super stiff and weigh 83.9 kilos.

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I was at an LBS today and saw some really fat tubulars. They looked like cyclocross tires, with little knobs.
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#158
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It is now time to experimentally determine whether I managed to get all the soap off of the rims.
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Tho it's probably the riding around on Varsinentals all the time that does the trick.

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● 1971 Grandis SL ● 1972 Lambert Grand Prix frankenbike ● 1972 Raleigh Super Course fixie ● 1973 Nishiki Semi-Pro ● 1979 Motobecane Grand Jubile ●1980 Apollo "Legnano" ● 1984 Peugeot Vagabond ● 1985 Shogun Prairie Breaker ● 1986 Merckx Super Corsa ● 1987 Schwinn Tempo ● 1988 Schwinn Voyageur ● 1989 Bottechia Team ADR replica ● 1990 Cannondale ST600 ● 1993 Technium RT600 ● 1996 Kona Lava Dome ●
#161
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I found the comments about difficulty in mounting the Compass tires interesting. My Compass Chinook Pass Standards went on Alex23 rims with tape and brand new Velocity Dyads with veloplugs very easily. I did not even need tire irons. From the thread, it may be that older vintage rims are harder to mount. Many years ago, I had a bike with Super Champion clincher rims that were very hard to mount Michelin 50 and the original Clement clinchers.
The Compass were far, far easier than when I first installed the Continental GP4000S-II tires on the Alex23s. That took two set of tire irons and a second person, and foreign expletives. I did find though that when I put the GP4000S-II back on the original rims it was very easy.
I will say clinchers have really improved over the years.
The Compass were far, far easier than when I first installed the Continental GP4000S-II tires on the Alex23s. That took two set of tire irons and a second person, and foreign expletives. I did find though that when I put the GP4000S-II back on the original rims it was very easy.
I will say clinchers have really improved over the years.
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my first set had over 1500 miles on it till its first flat, was reasonably easy to get off, repaired the tube, but likely pinched it going back on. Replaced it with a new tube and no problems since, but since I dirtied the sidewalls (rear tire) after takin off - on 3 times, I elected to order a new set for Eroica. Again had the LBS install, this time using some smooth and slick Stan's rim tape which made it a bit easier but the tech still had a time of it. Incidentally, he added some Stan's sealant too so we'll see how these hold up.
i still need to clean the old pair's sidewalls and then remount to some other rims. I'll swap the tires front to back as they still have plenty of tread left. Overall, I'm very pleased with the Compass tires and they were the talk and a little envy of some at Eroica "wow, those look big!" And "probably a good setup for gravel, assuming you have the clearance".
one thing I did notice, when the new tire set was installed, the tech super cleaned my rims, which made them all shiny and clean. Once I re-installed them, the brakes were grippy as hell but also squealed both front and rear like crazy. These were on Campagnolo NR sidepulls with Kool Stop Black pads, broken in with 1700 miles on them. After two rides and 75 miles of this, I reangled the toe-in with a 0.75-1.0mm shim at the front of the pad holders and all of the squeal was gone. Braking was still very good but not as extremely grippy as before, but easily modulated. I'd probably use increments of .25mm shims next time to see if I can get more initial pad to bite without the squeal and vibration. As the pads leave some residue on the brake tracks, we'll see how well they hold up.
The last two pics are as the bike was set up for Eroica with a Campy NR derailleur with Rally Long cage, 14-28 Suntour Freewheel and Campagnolo modified triple with 52-42-28 (74bcd triple mod).




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#164
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Nice looking bikes!
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#167
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The Heisenberg Uncertainty Principle applies to BF threads. Who knew?
PS: I should have bought the Compass tires.
PPS: I did buy the Tire Jack @noglider suggested.
PS: I should have bought the Compass tires.
PPS: I did buy the Tire Jack @noglider suggested.
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PPS: I did buy the Tire Jack @noglider suggested.
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On my Pacenti rims, the tire jack does more than that. It makes mounting possible. Without it or something similar, I would not be able to get my tires on. Using levers, I have a 50% chance of pinching the tube.
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About seven hours after mounting, and inflating to 80PSI, they measure 27.55mm wide. Subjectively, they look less voluminous than the 120 TPI Clement Strada 28mm tires I took off.
I need to figure out what pressure to ride these. For a 200lb payload, I don't want them too squishy.
I need to figure out what pressure to ride these. For a 200lb payload, I don't want them too squishy.
Fortunately, the tire was undamaged, and I have now decided that 70PSI should be absolutely fine.
For a tire that was so hard to mount in the first place, it sure as **** unmounted itself without much of a struggle.
At least getting it back on (with a new tube) was a bit easier this time around (and also thanks to @noglider for that tool recommendation).
By the time I got it all reassembled, it was too hot to go for a ride.
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I wonder if it was all that goddamn soap I had to use to mount the tires the first time around?
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Has anyone in these parts run the Chinook Pass tires tubeless? I’m thinking of trying that on a set of Pacenti brevet rims.
#174
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Today for some reason I thought I might try pumping the rear tire to 90 PSI. (The max is supposedly 115.) A few minutes later, the tire blew right off the H+Son TB14 rim. It was a bit loud and in my face, as it was situated fairly near my face.
Fortunately, the tire was undamaged, and I have now decided that 70PSI should be absolutely fine.
For a tire that was so hard to mount in the first place, it sure as **** unmounted itself without much of a struggle.
At least getting it back on (with a new tube) was a bit easier this time around (and also thanks to @noglider for that tool recommendation).
By the time I got it all reassembled, it was too hot to go for a ride.
Fortunately, the tire was undamaged, and I have now decided that 70PSI should be absolutely fine.
For a tire that was so hard to mount in the first place, it sure as **** unmounted itself without much of a struggle.
At least getting it back on (with a new tube) was a bit easier this time around (and also thanks to @noglider for that tool recommendation).
By the time I got it all reassembled, it was too hot to go for a ride.
#175
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It very easily could have happened. I trashed the first inner-tube trying to get the tire on. I guess it was better to find out in the garage than on the road. I deflate and re-inflate a couple of times to try to avoid that kind of scenario, but it is hardly fool-proof.