[RBW] Re: Grand Bois Cypres tires, a review.

I did that with every bike in the house, and found the Bicycle Quarterly weight distribution breakdowns for different styles of bike 100% correct. __Rear / front "Road bike" - 60/40 "Low trail" - 55/45 "3 Speed" -65/35 - ? From memory. "Tri Bike" - 45/55 - ? Not verified by me. I

[RBW] Re: Grand Bois Cypres tires, a review.

Did some searching. Oh dear, it's as bad as I thought... It’s easy enough to do: put a bathroom scale under one wheel and a wood > block the same thickness as the scale under the other wheel. First, weigh > yourself standing on the scale while lifting the bike off of the ground. > Then sit on

[RBW] Re: Grand Bois Cypres tires, a review.

Naive question. Just how does one determine one's weight distribution? I am picturing a dubious situation with two bathroom scales. Thanks in advance, Tom On Sunday, June 22, 2014 10:21:47 AM UTC-7, Anne Paulson wrote: > > I got back yesterday from Sierra to the Sea, a 586 mile supported bike

[RBW] Re: Grand Bois Cypres tires, a review.

Don Compton, Congrats. That's where I started and then went down a bit more from there. Cool that you either really noticed a difference or you are being taken in by just changing a variable and have the ride be different. I think the tires are actually that good and THEY do make a difference

[RBW] Re: Grand Bois Cypres tires, a review.

Ed, I took the Roadeo out for a ride at 65lbs,75lbs front/rear. SWEET! I hadn't been riding it for awhile. I am back. Don On Sunday, June 22, 2014 7:01:19 PM UTC-7, eflayer wrote: > > Don, > > My Cerfs are 28 mm. I run 85 psi in Michelin Lithion 25 mm. Reduce the > pressure, enjoy the ride. >

Re: [RBW] Re: Grand Bois Cypres tires, a review.

I totally agree. As our research has shown, tire pressure is much less important than most of us used to think. This is especially true with supple tires. When we tested a Vittoria CX, it no longer held its line in corners because the sidewalls collapsed before the rolling resistance goes up si

Re: [RBW] Re: Grand Bois Cypres tires, a review.

I think that's over complicating things. It's just a guideline. If you end up with 25% tire drop instead of the ideal 15%, under hard braking on a rough downhill... Who cares? Your tires are now compressing more than the ideal theoretical amount to give you the lowest rolling resistance, but you

Re: [RBW] Re: Grand Bois Cypres tires, a review.

I don't have a front load and I had considered going downhill and had added 5psi to account for different on bike positions. On rough steep I tend to use my MTB skills and push my weight far back. I had never considered breaking forces. I think that should be mentioned anytime the Berto Pressure dr

[RBW] Re: Grand Bois Cypres tires, a review.

Do you ride with a front load? My pressures are optimized for a few pounds directly over the front axle via the handlebar bag. Also Anne's comment about descents is absolutely true-- whether in an aero tuck or feathering the brakes from the drops, with my butt weight lifted off the saddle, du

Re: [RBW] Re: Grand Bois Cypres tires, a review.

Here is a photo of what happens when you brake hard, even if you move your weight back: http://janheine.wordpress.com/2013/08/23/how-to-brake-on-a-bicycle/ Since the rear wheel isn't touching the ground, 100% of the weight rests on the front wheel. BTW, the rider did not go over the bars, this

[RBW] Re: Grand Bois Cypres tires, a review.

exploring the nuances of supple-walled* 20 inch tires in a controlled environment *not really On Wednesday, June 25, 2014 5:31:03 PM UTC-4, Bill Lindsay wrote: > > Jan Heine loves doing

Re: [RBW] Re: Grand Bois Cypres tires, a review.

That's an interesting thought. Off road, straight through the bumps, I move back on the bike, maybe even for a net effect of *less* weight on the front. On road, I do weight the front, because I want to commit to the turns. I usually run a five pound difference in pressure between the front an

[RBW] Re: Grand Bois Cypres tires, a review.

Jan Heine loves doing endos. Rumor has it one of the reasons he likes SPD pedals is that they are good for bunny hops. I've heard he's bad at wheelies, though. I'm going to go out on a limb and guess he can't do a table top. :-)

[RBW] Re: Grand Bois Cypres tires, a review.

When you brake hard, you put 100% of your weight on the front wheel. With wide tires that run at relatively low pressures, that determines your tire pressure more than the load on the tire. I find that about 10% less pressure in the front than the rear works best for me on 42 mm Extralight tire

Re: [RBW] Re: Grand Bois Cypres tires, a review.

I run 65/75, because I weigh 265 and I get pinch flats if I run less than 60/70. My main concern is smoothing out the chip seal and those pressures work fine for doing that. On Wed, Jun 25, 2014 at 2:57 PM, Dave Johnston wrote: > Why are everybodies F& R tire pressures so close? Are you really

Re: [RBW] Re: Grand Bois Cypres tires, a review.

I keep my pressure equal front to rear (40 psi on the QB, 20-30 on the Hunqapillar). I suspect due to the rocks in my head that my weight distribution is more even. Grin. With abandon, Patrick -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" grou

Re: [RBW] Re: Grand Bois Cypres tires, a review.

What about steep bumpy descents? Doesn't that throw your weight forward, so that you need about as much pressure in the front as the rear? On Wed, Jun 25, 2014 at 12:57 PM, Dave Johnston wrote: > Why are everybodies F& R tire pressures so close? Are you really that > centered over the wheels? I

[RBW] Re: Grand Bois Cypres tires, a review.

Why are everybodies F& R tire pressures so close? Are you really that centered over the wheels? I recently started running 45/65 psi on Cypress based on a 40%/60% weight distribution and its been a revelation that my front was pumped to hard and my rear not enough. The lower pressure in the fro

Re: [RBW] Re: Grand Bois Cypres tires, a review.

Tim, Thanks for your reply. I have a pair of 700x26 cerfs, but the Vredestien 25mm Grand Fondo Tricomps are about the same size and I have had great luck with them including a great ride. I think that the 28 Cerfs are quite a bit more compliant than the 26's. The 28s seem large for their size, w

Re: [RBW] Re: Grand Bois Cypres tires, a review.

Don- The GB Cerf Blue (or Compass Cayuse Pass) tires measure 26 mm wide, so you may be able to fit those on your IF's. I put them on my Giordana, which won't fit 28 mm tires. On Sun, Jun 22, 2014 at 9:33 PM, Don Compton wrote: > Thanks for your reply. I am going give it a try. > My go fast bi

[RBW] Re: Grand Bois Cypres tires, a review.

Thanks for your reply. I am going give it a try. My go fast bikes are my Independent Fabrication bikes and the Grand Bois won't fit. I ride 25's on them. Its fun to have bikes with different handling and ride characteristics. Enjoy your riding. On Sunday, June 22, 2014 7:01:19 PM UTC-7, eflayer

[RBW] Re: Grand Bois Cypres tires, a review.

Don, My Cerfs are 28 mm. I run 85 psi in Michelin Lithion 25 mm. Reduce the pressure, enjoy the ride. On Sunday, June 22, 2014 10:21:47 AM UTC-7, Anne Paulson wrote: > I got back yesterday from Sierra to the Sea, a 586 mile supported bike > tour from Lake Tahoe to San Francisco. > > I used the

[RBW] Re: Grand Bois Cypres tires, a review.

Just curious, what size are your "Cerfs"? I have 700x28s on my Riv Roadeo and am very happy with them. But, I have been running 75lbs front and 85lbs rear. I am lighter and wonder if I could ride with a little less pressure. On Sunday, June 22, 2014 10:30:19 AM UTC-7, eflayer wrote: > > I think

[RBW] Re: Grand Bois Cypres tires, a review.

I think a lot of bike parts hype is mostly just hype. And I prefer the scientific to mere annecdotal evidence. I have no real science on MY Cerfs and my Cypre tires. I don't even have a very good imagination. But I swear these 2 sets of tires have made their corresponding bikes so much more fun