^this is true
???
Pretty sure there aren’t any.
Also, wtf? ^^ Dunst?
Fwiw, I rode 700 x 26c Grand Bois and found them a treat. Roll well, great feel and very supple. Just don’t over pump them, learn to run lower pressures 
http://www.bikequarterly.com/images/TireDrop.pdf
I gotz some 32c’s and hope to build a bike up just for them shortly. I’ll holla back when I’ve done some miles to properly evaluate them.
i just emailed the pdf to a number of 65kg members of our sydney crew who insist on running up to 130psi cause they are totally off the mark about rolling resistance… i hope they bother to read and absorb this information!
thanks ben and it was nice to see you today by the way . you are truly the king of bike nerds and that is a position of great honour in my books.
Lowering pressures seems counter-intuitive, it’s so hard to take the plunge and actually do it. I’m running my 32c hyper-randos at around 70-80 but know I should go lower. I need help.
Glad to hear you like the Grand Bois, Spiz. I’ve pretty much heard nothing but good reviews, am itching to get my hands on a set. Need new bike first. 
a very high profile mod refuses to acknowledge the science of this either so they wont be alone in ignoring it. let yourself down slowly is my advice so you dont notice the ‘change’, but do notice how ‘smooth’ your bike feels.
it can be as simple as not pumping up your tires as regularly/much.
what also should be factored in is how ‘hard’ you ride your bike. if you are ‘heavy on your bike’ (eg an ex-MTB rider) you may be more prone to pinch flats due to that fact. this isnt as much weight dependent as it is how you ride your bike. however, <100psi is still enough.
the idea of an alu frame with 23c and >110psi scares my body.
why don’t you ask for no tyres and fit your own?
^^ agree with above in some conditions, have also read that article as im about 69kg ringing wet and run 140psi in the rear.
with high pressure you do feel the drag on shithouse roads, but that being said, if you hit a nice stip of new road nothing beats the gliding feeling of high pressure
i realise the shit roads outweighs the good roads here, but im still reluctant to lower pressure.
When you have too much pressure the tires will bounce over the road surface, fighting the road not compyling to the surface. That vertical movement robs you of your forward momentum and reduces grip
I’m 85kgs and I run 97/100 psi… If it’s wet I’ll make it 90/95 to increase the grip a little. I never suffer from lack of pace on rolling roads nor do I ever lock the rear or get unexpected slides.
The pressure chart is a great peice of knowledge
Experimenting with lower pressures (IMO) also depends on the tyres. Low pressures on a tyre with stiff sidewalls and over the top belts for puncture resistance might not be the best to run at low pressures with as the tyre could move around a lot, feel vague when initiating a curve and won’t inspire confidence.
Supple tyres like the Grand Bois (and in my experience Veloflex Pave’s, Michelin Pro Race and Vittoria Open Corsa) don’t squirm and move around as much, remain round and feel even more secure when dropping pressures. I haven’t had a chance to run Challenge tyres as yet but they’re supposed to be a very fine tyre for lower pressures, particularly the the Parigi Roubaix which is rated at 28c but runs wider on some rims.
It’s not a new thing. Tyre pressures have steadily been dropping in the peleton for some time as the data outshines what may “feel” faster. Air costs nothing and is easy for anyone to experiment with. I like to run on the safer side and don’t like my tyres to bottom out so I run just enough to prevent that + a smidge more (just in case). I don’t get super clinical … I just watch the tye as I’m riding to see the right amount of bulge at the contact spot and make a note of what i inflated it at if it looks right. And I do it for comfort rather than speed, but I do notice that the by product is rolling further. Win/win
I do acknowledge that everyone likes their bikes to ride a certain way and that it might not feel right for everyone. But like I said it’s easy to try out … free actually.
Ooh … forgot to mention the importance of wheel load (how much weight you have on each wheel) when riding in your normal position and with everything attached that you normally ride with. Easiest way is to use a bathroom scale under the wheel with the other side elevated so it’s at the same height. A set of bathroom scales under each wheel is ideal (borrow your neighbours). Guaranteed your wife/significant other/flat mate will walk in you when your doing this, thus confirming that you are mad !!!
Just fucking ride it!!
that’s what she said
- nothing beat the mad fixie skids of an eversquare at 140psi
You need to get out more.
Yes, but at approx. 90psi
+1
where do you normally do your “mad fixie skids”? im usally out during such acts
Bumpin cos im liking what i see on all these gumwall builds.
Seeing as this thread a near 3 years old, whats recommended now?
still grand bois? veloflex?
Using for another commuter build, mainly ride on the road. 700c x 25 would be good, but could go either way i guess. Clinchers.
Dont want to be spending more then a price of a gator in reality, as it is mainly a commuter. But i guess if i have to…
go.