Re: Tyre Pressure Front / Rear Balance

Postby Velocipedestrian on Tue 7/Apr/15 2:04pm

Nobody's stem is long enough to mount that crap.
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Re: Tyre Pressure Front / Rear Balance

Postby Conners on Tue 7/Apr/15 2:23pm

If I hang my bike by the seat, I noticed that 100% of its weight is measured at the seat.

What pressure should I run in my dropper post?
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Re: Tyre Pressure Front / Rear Balance

Postby Wobbler on Tue 7/Apr/15 2:27pm

Conners wrote:If I hang my bike by the seat, I noticed that 100% of its weight is measured at the seat.

What pressure should I run in my dropper post?


Do you weigh as much as a duck?
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Re: Tyre Pressure Front / Rear Balance

Postby ryda on Tue 7/Apr/15 4:34pm

Do clip or flats change the ballance ?
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Re: Tyre Pressure Front / Rear Balance

Postby AgrAde on Tue 7/Apr/15 4:40pm

What about tripalz? :blink:



It depends how you ride, what your tires are, what your rims are, how much you weigh... The best thing to do is to just play with it until you find something you're happy with.

The stans calculator is bullshit, tires don't stay on my stans rims when I use the pressures they recommend and attempt to corner. A rule a lot of people tend to follow is let pressure out until you start to feel squirm, then pump it back up until it's gone. Doesn't take into account playful/retarded riding or pinchflat avoidance though.
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Re: Tyre Pressure Front / Rear Balance

Postby Wobbler on Tue 7/Apr/15 4:46pm

AgrAde wrote:It depends how you ride, what your tires are, what your rims are, how much you weigh... The best thing to do is to just play with it until you find something you're happy with.


and use the same gauge each time
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Re: Tyre Pressure Front / Rear Balance

Postby AgrAde on Tue 7/Apr/15 4:54pm

Yeah, true. Maybe I'm lucky but all the floor pumps in my garage (there has been four, due to living with different people) have always agreed with each other.
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Re: Tyre Pressure Front / Rear Balance

Postby Wobbler on Tue 7/Apr/15 5:22pm

I've had a bunch that have usually been at least 3psi away from each other
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Re: Tyre Pressure Front / Rear Balance

Postby znomit on Tue 7/Apr/15 6:28pm

Don't forget the front will heat up somewhat under braking so apply your ideal gas laws when calculating front pressure. You're using nitrogen of course, aren't you?
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Re: Tyre Pressure Front / Rear Balance

Postby Astoria Paranoia on Tue 7/Apr/15 6:31pm

Conners wrote:If I hang my bike by the seat, I noticed that 100% of its weight is measured at the seat.

What pressure should I run in my dropper post?


Well you'll need different pressures if you're extending it or retracting it too.
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Re: Tyre Pressure Front / Rear Balance

Postby Wobbler on Tue 7/Apr/15 6:33pm

znomit wrote:Don't forget the front will heat up somewhat under braking so apply your ideal gas laws when calculating front pressure. You're using nitrogen of course, aren't you?
What about the warming effect on the jizz? Is there an ideal jizz law :eh:
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Re: Tyre Pressure Front / Rear Balance

Postby Farm on Tue 7/Apr/15 6:42pm

Wobbler wrote:
znomit wrote:Don't forget the front will heat up somewhat under braking so apply your ideal gas laws when calculating front pressure. You're using nitrogen of course, aren't you?
What about the warming effect on the jizz? Is there an ideal jizz law :eh:

Yes there is, if you're getting your jizz warmed. It's ideal.
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Re: Tyre Pressure Front / Rear Balance

Postby Farm on Tue 7/Apr/15 6:50pm

Getting back to closer to on track.
I've never been able to ride lower than about 45 psi, even tubeless. I weigh about 100kg.
I assume it's because I ride like a spaz, banging into stuff rather than shifting my weight to get over stuff more gently?
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Re: Tyre Pressure Front / Rear Balance

Postby wachtourak on Tue 7/Apr/15 7:32pm

Maybe


45psi is absurdly high, even for your weight





For the record I run 2-3psi less in the front. Mid 20's on 2.35 tyres. Tubeless. Wide-ish rims (older Enve's so 23mm internal?) Right now around 73kg so closer to 80kg with shoes, gear and a full hydrapack I reckon.

On the road bike I run maybe 5 psi less in the front. 85 front and 90 rear on 25mm tyres and standard 15mm internal rims (Mavic). Tubes. I kinda wanna go road tubeless but still not convinced at those sorta pressures. Heard too many blowout horror stories and not enough choice in tyres still.

CX bike, 33mm tyres on Stans Iron Cross rims (so 17-18mm internal?), 30ish PSI for CX, 40ish on the road. In between for MTB track fumming. Also tubeless.
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Re: Tyre Pressure Front / Rear Balance

Postby Wobbler on Tue 7/Apr/15 7:52pm

Farm wrote:Getting back to closer to on track.
I've never been able to ride lower than about 45 psi, even tubeless. I weigh about 100kg.
I assume it's because I ride like a spaz, banging into stuff rather than shifting my weight to get over stuff more gently?


What happens at lower pressures?

I'm ~110 and have 32ish on some maxxis 2.5 exo single pls on stans flows tubeless and dont have issues denting rims or with flats
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