The Street > The Bike Shop
lets talk tire sizes, pressures etc
alaskun:
nosemanuals always came easier to me when I was outrunning a flat/leaking rear tire, so... maybe?
G:
--- Quote from: Sasper on November 23, 2015, 10:34:05 AM ---but what about answering my question, which is that , is there any truth behind bigger tire - less psi - better bunnyhop?
i dont think so but..
--- End quote ---
I think that's too subjective. The energy needed to compress the tyre to the rim is simple provable physics, how you bunnyhop and what is "better" has too many variables and will probably vary with the rider. Simple enough thing to try for yourself and see. Build a basic bunnyhop bar, and try it at varying pressures...
:)
G.
LukeTom:
My perspective is from riding trails. So my experience comes pretty much 100% from that; although I find mannys easier with lower PSI
In regards to trails, a thin tire and/or low PSI on the back leads to some serious pinch punctures if you hang up, but if you tend to land flat the low PSI can be a saviour on your wrists. Also, when you ride sandy trails your psi is almost necessary to be low (and wide tires), or you end up sliding everywhere, and carving them up. But with most places I ride thick (above 2in) and with a PSI between 60-90 depending on the conditions/what I am trying to do (getting through the line or trying tricks etc.)
As with everything it really depends on what you are riding and what you are trying to achieve in your session, so bring a pump!
JFax:
I can see how it physically could help out. If you compress the tyre upon lifting the front and pressing down on the rear tyre a preassure should build up that could technically function as a spring when you release the rear tyre when lifting it up.
It can probably be calculated but I think that there are too many variables to calculate it easily. No idea at all if the spring force would mount to an amount that would actually help you during bunny-hops...
I can sometimes feel though that low preassure tyres are easier to ride street with compared to mine, that normally run at 5-7 Bar. Not sure if its because of this or just the general feel of the bike.
bsd510:
--- Quote from: Sasper on November 23, 2015, 10:34:05 AM ---but what about answering my question, which is that , is there any truth behind bigger tire - less psi - better bunnyhop?
i dont think so but..
--- End quote ---
I find it way harder to bunnyhop when my tires are below 60 psi. When my tires are low, I can sometimes feel my rim bottom out on the concrete when I hop, or it just sucks up all my pop. The only reason I tried running low psi is because of that one rider Andrew Jackson. He could always easily hop up/over the tallest stuff at 40psi and said riding low pressure helps but when I rode his bike it always felt like shit to hop
I think anywhere from 60-90psi is a good amount. I used to run 90-100 cuz my friend always has 110psi and I liked the basketball feeling, but I found that for wallride grip, bunnyhops, rolling resistance and overall comfort 70-80psi is a good medium.
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