What do you guys run for pressure?
I used to always run at like 80psi, then i started always getting flats, so i started riding only 50psi.
I'm starting to ride 80psi again, but some of my tires say they can run at like 100+ psi. though, iv'e never tried.
derrickito
Posted: Thu Feb 09, 2006 11:06 am
now with 50 percent more EVILJoined: 22 Jul 2005Posts: 10566
you're running 80-50 on road tires? thats why you're getting flats
if your tires say 100, put in 100. you'll only get flats rarely
all my tires run 110. and i top them off just about every ride i go on.
lieutenantsean
Posted: Thu Feb 09, 2006 11:08 am
Joined: 10 Oct 2005Posts: 1255
I run about 100 in the rear and 90-ish in the front.
You don't have to run max pressure, but tires hold up better and you'll get fewer flats if you run your tires somewhere around it.
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dennyt
Posted: Thu Feb 09, 2006 11:08 am
rocket mechanicJoined: 02 Aug 2005Posts: 2708
Damn!
I air my 27x1-1/4's up to 100, then pump them up once a week, they usually get down to 80 or so. Any lower and they're a real drag and a pinch flat hazard and they move around a lot when you stand a climb / sprint.
josh m
Posted: Thu Feb 09, 2006 11:08 am
Joined: 09 Jan 2006Posts: 448Location: portland
Thanks.
I never bothering inquring about that so..
Aaron
Posted: Thu Feb 09, 2006 11:18 am
Joined: 25 Jul 2005Posts: 4645
Tire pressure is listed on the sidewall. Don't varry +/- by more than 10%
Fat people should use higher pressue, skinny folk use lower.
Fat tires can be run at lower pressure, skinny ones higher.
dennyt
Posted: Thu Feb 09, 2006 11:22 am
rocket mechanicJoined: 02 Aug 2005Posts: 2708
I prefer fat tires at high pressure. Cause I'm fat and I jump off shit.
I really need a bmx bike again.
SeditiousCanary
Posted: Thu Feb 09, 2006 12:27 pm
sorry, can't make it!Joined: 26 Jan 2006Posts: 2315Location: Fremont Troll
dennyt wrote:
I really need a bmx bike again.
I've got one to sell if you are intersted. It's a lighter weight jump bike.
Joined: 08 Jan 2006Posts: 359Location: Imaginary Places
I realized today that most of the .83 rides I have been on I have been riding at like 70psi, no wonder I couldn't keep up with you fatties.
watch out, I am at 110 tonight and suddenly I have full leg extension, damn, what a difference from being all crouched up.
Aaron
Posted: Thu Feb 09, 2006 4:19 pm
Joined: 25 Jul 2005Posts: 4645
seaden wrote:
mine are always 120psi
You would be fine at 90 or 100psi! You would have better traction and more control without any speed loss. Also your bike would be more comfortable.
seaden
Posted: Thu Feb 09, 2006 9:48 pm
Joined: 09 Dec 2005Posts: 397Location: CapHill
I like a hard ride..hard tires...stiff butt bone cracking saddle.
I'm going to start runing solid rubber... psi is over rated... and guess what... bring on the fucking train yard! yeah bitches.... now you know!
_________________ "They better stop cause I'm NOT!" Paul
zuvembi
Posted: Fri Feb 10, 2006 12:46 pm
Joined: 24 Jul 2005Posts: 942Location: Little Addis Ababa
dennyt wrote:
I prefer fat tires at high pressure. Cause I'm fat and I jump off shit.
I really need a bmx bike again.
I'll add a rousing 'me too' to that.
I run 28mm - 90 PSI up front, 32m 90 PSI on the rear. It's a touch over the max lawyer recommended inflation, but not too much.
Now I just need to get that 48 spoke hub for the rear wheel. Heh.
candrewt
Posted: Sun Feb 12, 2006 1:19 pm
Joined: 06 Aug 2005Posts: 21Location: San Francisco
i have 27x1 1/4 tires, i inflated them to around 80 psi last night, it says the max is 100, and rode another 5 miles home, i just went out and looked and my front tire has a huge hole in it and the tire is partially off... wtf.
and there is white powder stuff inside, is that normal, i dont think ive ever noticed it before.
SeditiousCanary
Posted: Sun Feb 12, 2006 8:21 pm
sorry, can't make it!Joined: 26 Jan 2006Posts: 2315Location: Fremont Troll
candrewt wrote:
i have 27x1 1/4 tires, i inflated them to around 80 psi last night, it says the max is 100, and rode another 5 miles home, i just went out and looked and my front tire has a huge hole in it and the tire is partially off... wtf.
and there is white powder stuff inside, is that normal, i dont think ive ever noticed it before.
27" x 1 1/4" tyres are mostly crap nowadays as are the rims you see for them. The odds are the tyre blew off the rim because it wasn't seated well. There is a mold line near the bead of the tyre that you should examine carfully when inflating any tyre, but especially so on 27" x 1 1/4" gumwall tyres on a steel rim. Get enough pressure in the tube to make it "round" and mount the tyre on the rim. Get it as straight as you can, then add about 20 PSI. Hold the wheel and spin it slowly. Watch the rim and the mold line near the bead and see if they are parallel and evenly spaced on both sides. Adjust if needed, then inflate to 60 PSI and repete. 80 PSI, you get the idea..
The powder stuff is talcum powder. It keeps the tube from sticking to itself.
Aaron
Posted: Sun Feb 12, 2006 8:33 pm
Joined: 25 Jul 2005Posts: 4645
there is this really cool bike shop over in West Seattle that carries quality tires in 27". Schwalbe, Serfas, IRC, etc. None of that Gum Wall shit!
Oh, and they carry 650, 650A, 650B and 650C tires for all you hipsters!
650 by the way is regular old MTB size.
More tire selection than Performance!
Oh, and the owner has a box in the back with ".83" written on it where he saves good tires for his poor homey riding buddies. Word has it there are some sweet Continental tires there right now taken off of one of his rich customers bikes!
Aaron
Posted: Sun Feb 12, 2006 8:39 pm
Joined: 25 Jul 2005Posts: 4645
Sun Rims CR-18 is an excellent 27" rim. In stock!
SeditiousCanary
Posted: Sun Feb 12, 2006 8:57 pm
sorry, can't make it!Joined: 26 Jan 2006Posts: 2315Location: Fremont Troll
Aaron wrote:
Sun Rims CR-18 is an excellent 27" rim. In stock!
You sir, are the exception.
Aaron
Posted: Sun Feb 12, 2006 9:46 pm
Joined: 25 Jul 2005Posts: 4645
SeditiousCanary wrote:
Aaron wrote:
Sun Rims CR-18 is an excellent 27" rim. In stock!
You sir, are the exception.
Yeah, most shops don't like to fix bikes. They just want to sell you something new.
I overhauled an 8 speed Shimano STI lever yesterday. 2 other shops told him he needed a new one. The grease was just old and sticky.
dennyt
Posted: Sun Feb 12, 2006 11:27 pm
rocket mechanicJoined: 02 Aug 2005Posts: 2708
SeditiousCanary wrote:
Aaron wrote:
Sun Rims CR-18 is an excellent 27" rim. In stock!
You sir, are the exception.
Yup, I rode my bike over to a wrench party last fall, cut the rim off, got the rim mentioned above out of Aaron's stock, laced it up and rode home.
Now that's a sweet bike shop experience.
josh m
Posted: Mon Feb 13, 2006 12:08 am
Joined: 09 Jan 2006Posts: 448Location: portland
does the cr-18 look similar to the mz-14?
I bought a set of brand new mz-14's off a guy last year, and then had the front one stolen. I found out they only come stock on bikes... psh.
keyholefish
Posted: Mon Feb 13, 2006 6:48 am
Joined: 25 Jul 2005Posts: 268Location: somerville, ma
Aaron wrote:
Tire pressure is listed on the sidewall. Don't varry +/- by more than 10%
I had some racing tires rated to 180 psi once. I pumped them up to 160 for time trials, but otherwise ran about 110. I miss 'em.
candrewt
Posted: Tue Feb 14, 2006 12:22 pm
Joined: 06 Aug 2005Posts: 21Location: San Francisco
just came buy yesterday and bought a couple tubes from you arron, too bad i didnt check this first, maybe tomorrow ill come by for the tires before work.
the rim is old and shitty, i had to sand some rust out of the inside before i put the new one on, but it will have to do for a while.
candrewt
Posted: Tue Feb 14, 2006 12:32 pm
Joined: 06 Aug 2005Posts: 21Location: San Francisco
SeditiousCanary wrote:
candrewt wrote:
i have 27x1 1/4 tires, i inflated them to around 80 psi last night, it says the max is 100, and rode another 5 miles home, i just went out and looked and my front tire has a huge hole in it and the tire is partially off... wtf.
and there is white powder stuff inside, is that normal, i dont think ive ever noticed it before.
27" x 1 1/4" tyres are mostly crap nowadays as are the rims you see for them. The odds are the tyre blew off the rim because it wasn't seated well. There is a mold line near the bead of the tyre that you should examine carfully when inflating any tyre, but especially so on 27" x 1 1/4" gumwall tyres on a steel rim. Get enough pressure in the tube to make it "round" and mount the tyre on the rim. Get it as straight as you can, then add about 20 PSI. Hold the wheel and spin it slowly. Watch the rim and the mold line near the bead and see if they are parallel and evenly spaced on both sides. Adjust if needed, then inflate to 60 PSI and repete. 80 PSI, you get the idea..
The powder stuff is talcum powder. It keeps the tube from sticking to itself.
thanks
Aaron
Posted: Tue Feb 14, 2006 2:09 pm
Joined: 25 Jul 2005Posts: 4645
Denny's old rims are in the .83 Free box I keep at the shop. They are still good and are 27"
In the Point 83 FREE box I toss tires, wheels, pedals or any other good part I think you all can use. All the parts are used but in good condition..
eternalignorance
Posted: Tue Feb 14, 2006 2:13 pm
Joined: 08 Jan 2006Posts: 359Location: Imaginary Places
Aaron wrote:
Denny's old rims are in the .83 Free box I keep at the shop. They are still good and are 27"
In the Point 83 FREE box I toss tires, wheels, pedals or any other good part I think you all can use. All the parts are used but in good condition..
holy moly, I need a rear 27" wheel. the curb ate mine, and then I tried ot fix it by hitting it with things....I dont really have any of my own tools.
lantius
Posted: Tue Feb 14, 2006 2:17 pm
1337Joined: 22 Jul 2005Posts: 6705Location: right over
eternalignorance wrote:
holy moly, I need a rear 27" wheel. the curb ate mine, and then I tried ot fix it by hitting it with things....I dont really have any of my own tools.
might i suggest that the second part there should get a little bit of attention. you don't need alot but the 'hitting it with things' solution is a tricky one to get just right. i've learned that by experience!
Aaron
Posted: Tue Feb 14, 2006 2:20 pm
Joined: 25 Jul 2005Posts: 4645
I have 3 hammers on my work bench. Why do you think I am so good at fixin' shit?
See 'em there just to the right of Val?
eternalignorance
Posted: Tue Feb 14, 2006 2:24 pm
Joined: 08 Jan 2006Posts: 359Location: Imaginary Places
I used my krypto lock as a hammer which I hit against allen wrenches to knock in a little outtie the curb made on my side wall back in, I think it made it more wobbly than before though.
Aaron
Posted: Tue Feb 14, 2006 2:29 pm
Joined: 25 Jul 2005Posts: 4645
eternalignorance wrote:
I used my krypto lock as a hammer which I hit against allen wrenches to knock in a little outtie the curb made on my side wall back in, I think it made it more wobbly than before though.
You can do the job CAREFULLY with vise grips and 2 cone wrenches. Sandwich the rim and squeeze gently until the blip (technical term) is flattened. Or, bring it to my shop and I have a special tool. I used it on your rear rim when I straightened your seat stay. Lift your but off the saddle and ride loose. Learn to "float" over bumps! Your rims will thank you.
eternalignorance
Posted: Tue Feb 14, 2006 3:02 pm
Joined: 08 Jan 2006Posts: 359Location: Imaginary Places
Aaron wrote:
eternalignorance wrote:
I used my krypto lock as a hammer which I hit against allen wrenches to knock in a little outtie the curb made on my side wall back in, I think it made it more wobbly than before though.
You can do the job CAREFULLY with vise grips and 2 cone wrenches. Sandwich the rim and squeeze gently until the blip (technical term) is flattened. Or, bring it to my shop and I have a special tool. I used it on your rear rim when I straightened your seat stay. Lift your but off the saddle and ride loose. Learn to "float" over bumps! Your rims will thank you.
I do float over bumbs!
I know how to not fuck up my rims usually, I dont even touch my back to the edge of curbs, I hop the front wheel on and then I hop the back wheel on, all smooth like. any way this curb was just taller than most and i didnt get enough hop on the back tire fast enough.
Aaron
Posted: Tue Feb 14, 2006 3:04 pm
Joined: 25 Jul 2005Posts: 4645
eternalignorance wrote:
Aaron wrote:
eternalignorance wrote:
I used my krypto lock as a hammer which I hit against allen wrenches to knock in a little outtie the curb made on my side wall back in, I think it made it more wobbly than before though.
You can do the job CAREFULLY with vise grips and 2 cone wrenches. Sandwich the rim and squeeze gently until the blip (technical term) is flattened. Or, bring it to my shop and I have a special tool. I used it on your rear rim when I straightened your seat stay. Lift your but off the saddle and ride loose. Learn to "float" over bumps! Your rims will thank you.
I do float over bumbs!
I know how to not fuck up my rims usually, I dont even touch my back to the edge of curbs, I hop the front wheel on and then I hop the back wheel on, all smooth like. any way this curb was just taller than most and i didnt get enough hop on the back tire fast enough.
That happens to everyone.
eternalignorance
Posted: Tue Feb 14, 2006 3:08 pm
Joined: 08 Jan 2006Posts: 359Location: Imaginary Places
Aaron wrote:
eternalignorance wrote:
Aaron wrote:
eternalignorance wrote:
I used my krypto lock as a hammer which I hit against allen wrenches to knock in a little outtie the curb made on my side wall back in, I think it made it more wobbly than before though.
You can do the job CAREFULLY with vise grips and 2 cone wrenches. Sandwich the rim and squeeze gently until the blip (technical term) is flattened. Or, bring it to my shop and I have a special tool. I used it on your rear rim when I straightened your seat stay. Lift your but off the saddle and ride loose. Learn to "float" over bumps! Your rims will thank you.
I do float over bumbs!
I know how to not fuck up my rims usually, I dont even touch my back to the edge of curbs, I hop the front wheel on and then I hop the back wheel on, all smooth like. any way this curb was just taller than most and i didnt get enough hop on the back tire fast enough.
That happens to everyone.
also like in mentioned before, I was riding at like 75 psi
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