Bicycle thread - Page 1717

pierce · 10-23-2012, 10:35 AM

thats another good point... I dunno what bike you have, but if it came with 35c tires, its likely some sort of hybrid? it probably doesn't have the best of rims unless it was a rather high end hybrid. 110 or 120 psi may be more than those rims are designed to handle (since a 35c tires is more like 70 psi). another factor is, the hybrid probably rides a little 'heavy', so its not as easy to 'unweight' (half jump) going over cracks, bumps. the worst, IMHO, are uneven pavement blocks, where you're hitting a sharp lip thats maybe 1 inch high, if you don't bunny hop over those, you can flat almost anything short of a big mountain tire, and maybe even taco your rim.

ducnut · 10-23-2012, 12:41 PM

Quote:

Originally Posted by brianwheelies

Thanks guys. I will give the gator skins a try once I wear out my current tires. Rear is getting flat across the top after a couple months of riding(600-700 miles).

Be sure to rotate your tires front to back (rear wears faster), as well reverse the rotation (left side wears faster, due to crown in the road), to get the most mileage out of them.

brianwheelies · 10-23-2012, 12:54 PM

Quote:

Originally Posted by pierce

thats another good point... I dunno what bike you have, but if it came with 35c tires, its likely some sort of hybrid? it probably doesn't have the best of rims unless it was a rather high end hybrid. 110 or 120 psi may be more than those rims are designed to handle (since a 35c tires is more like 70 psi). another factor is, the hybrid probably rides a little 'heavy', so its not as easy to 'unweight' (half jump) going over cracks, bumps. the worst, IMHO, are uneven pavement blocks, where you're hitting a sharp lip thats maybe 1 inch high, if you don't bunny hop over those, you can flat almost anything short of a big mountain tire, and maybe even taco your rim.

My bike has Alex 450 rims for cyclocross. Cyclocross bike.

I have been running the Michelin 700x25 slicks at 116 psi since having them on.

Ducnut, thanks for the rotation info. I had no clue!

Wish I had not bought a replacement rear now that I want a bigger tire. Maybe the LBS will take it back.

pierce · 10-23-2012, 01:02 PM

Quote:

Originally Posted by brianwheelies

My bike has Alex 450 rims for cyclocross. Cyclocross bike.

I have been running the Michelin 700x25 slicks at 116 psi since having them on.

Ducnut, thanks for the rotation info. I had no clue!

Wish I had not bought a replacement rear now that I want a bigger tire. Maybe the LBS will take it back.

ok, that a 14mm inside width rim. says 'road racing', so yes, very suitable for 25mm tires, although I'd still prefer the cushier ride of a good high TPI 28mm....

CX rims are usually more like 18mm inner. I'm kind of amazed someone spooned a 35mm wide tire onto a 14mm wide rim.

brianwheelies · 10-23-2012, 01:08 PM

Quote:

Originally Posted by pierce

ok, that a 14mm inside width rim. says 'road racing', so yes, very suitable for 25mm tires, although I'd still prefer the cushier ride of a good high TPI 28mm....

CX rims are usually more like 18mm inner. I'm kind of amazed someone spooned a 35mm wide tire onto a 14mm wide rim.

The bike itself is marketed as an all purpose bike with drop bar and alloy frame. It isn't heavy(22lbs before I went carbon fork which dropped serious weight).

The 700x35 were knobbied at the edges and less so in the middle.

So 28 instead of 32?

pierce · 10-23-2012, 02:00 PM

Quote:

Originally Posted by brianwheelies

The bike itself is marketed as an all purpose bike with drop bar and alloy frame. It isn't heavy(22lbs before I went carbon fork which dropped serious weight).

The 700x35 were knobbied at the edges and less so in the middle.

So 28 instead of 32?

thats where I'm heading, long term.

right now, I'm on 35's, I'm 210 lbs (down from 230), overweight /and/ lazy... when I get in better shape and wear out these 35s, I'll probably go 32 for one set, then if/when I get new wheels with better rims, I'll maybe end up on 28s. or get a new bike, I dunno.

I like the 35s off pavement too, they aren't as likely to go nuts on a rock or whatever on a fire road.

YakSpout · 10-23-2012, 02:45 PM

Quote:

Originally Posted by pierce

ok, that a 14mm inside width rim. says 'road racing', so yes, very suitable for 25mm tires, although I'd still prefer the cushier ride of a good high TPI 28mm....

CX rims are usually more like 18mm inner. I'm kind of amazed someone spooned a 35mm wide tire onto a 14mm wide rim.

No doubt. 35mm on a 14mm wheel? That's a LOT of sidewall bowing. Doesn't surprise me that it pinch-flatted like a mofo.

Mercury264 · 10-23-2012, 03:00 PM

Quote:

Originally Posted by ducnut

Be sure to rotate your tires front to back (rear wears faster), as well reverse the rotation (left side wears faster, due to crown in the road), to get the most mileage out of them.

Damn, I just never thought to do either of those things. Thanks

YakSpout · 10-23-2012, 03:58 PM

Quote:

Originally Posted by Mercury264

Damn, I just never thought to do either of those things. Thanks

Get a few more miles out of the tires that way.

I noticed that the Schwalbe Marathons are directional, but I don't know if reversing the tread would have any major effect. I did the swap on my Gatorskins and damn near wrecked trying to stop fast. Once they're worn now, I just replace them.

But I've been able to extend the life on a many a set of Hutch's, Mich's and Conti race tires by swapping front to back and flipping the tire on the wheel.

Gummee! · 10-23-2012, 04:05 PM

Quote:

Originally Posted by ducnut

Be sure to rotate your tires front to back (rear wears faster), as well reverse the rotation (left side wears faster, due to crown in the road), to get the most mileage out of them.

Thank doG someone else has been thinking and not just parroting Sheldon's inaccurate advice.

Did 4:25 on the bike today. 2 assholes. Both in/near Warrenton. That last 90min was teh suck. Legs are VERY tired after the week I've had.

M

pierce · 10-23-2012, 04:14 PM

tread on bicycle tires does zilch on the pavement. you don't need rain grooves with a skinny round profile tire, you aren't going to hydroplane.

heck, slicks even work pretty good on hardpack dirt. they only suck in soft or loose stuff.

so "directional" on bike tires, which are bias ply, is purely cosmetic.

YakSpout · 10-23-2012, 04:39 PM

Quote:

Originally Posted by pierce

tread on bicycle tires does zilch on the pavement. you don't need rain grooves with a skinny round profile tire, you aren't going to hydroplane.

heck, slicks even work pretty good on hardpack dirt. they only suck in soft or loose stuff.

so "directional" on bike tires, which are bias ply, is purely cosmetic.

About what I figured on the roadie.

YakSpout · 10-23-2012, 04:41 PM

Quote:

Originally Posted by Gummee!

Thank doG someone else has been thinking and not just parroting Sheldon's inaccurate advice.

Did 4:25 on the bike today. 2 assholes. Both in/near Warrenton. That last 90min was teh suck. Legs are VERY tired after the week I've had.

M

Huh. Hadn't seen that particular Sheldon note. Linky if you're interested.

I'll just continue to ignore it.

pierce · 10-23-2012, 04:49 PM

he's got a point., a front blowout at speed is skeeery, especially in a turn. I left quite a bit of road rash on Laureles Grade near Carmel Valley once when my front sew-up ("tubular" to you kids) came unglued at speed.

k7 · 10-23-2012, 09:46 PM

Quote:

Originally Posted by pierce

("tubular" to you kids)

10-23-2012, 10:35 AM	#25741
pierce Aven'Tourer Joined: Jan 2003 Location: S'Cruz Oddometer: 9,704	thats another good point... I dunno what bike you have, but if it came with 35c tires, its likely some sort of hybrid? it probably doesn't have the best of rims unless it was a rather high end hybrid. 110 or 120 psi may be more than those rims are designed to handle (since a 35c tires is more like 70 psi). another factor is, the hybrid probably rides a little 'heavy', so its not as easy to 'unweight' (half jump) going over cracks, bumps. the worst, IMHO, are uneven pavement blocks, where you're hitting a sharp lip thats maybe 1 inch high, if you don't bunny hop over those, you can flat almost anything short of a big mountain tire, and maybe even taco your rim. __________________ Experience is what you get when you don't get what you want.

10-23-2012, 04:14 PM	#25751
pierce Aven'Tourer Joined: Jan 2003 Location: S'Cruz Oddometer: 9,704	tread on bicycle tires does zilch on the pavement. you don't need rain grooves with a skinny round profile tire, you aren't going to hydroplane. heck, slicks even work pretty good on hardpack dirt. they only suck in soft or loose stuff. so "directional" on bike tires, which are bias ply, is purely cosmetic. __________________ Experience is what you get when you don't get what you want.

10-23-2012, 04:49 PM	#25754
pierce Aven'Tourer Joined: Jan 2003 Location: S'Cruz Oddometer: 9,704	he's got a point., a front blowout at speed is skeeery, especially in a turn. I left quite a bit of road rash on Laureles Grade near Carmel Valley once when my front sew-up ("tubular" to you kids) came unglued at speed. __________________ Experience is what you get when you don't get what you want.

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