Inflation on 25's?

[jmeloy]

Started riding a new set of HED Ardennes with 25's. What pressure should I try?
Thanks

[eddief]

i am 195 and ride 85 front 90 rear.

[rice rocket]

i am 195 and ride 85 front 90 rear.

Do you ever have issues w/ destroying rims?

I nail potholes about once a month, and I'm always afraid of rim destruction. I've already bent a front, and I was running 100 psi. Granted, it was a pretty nasty raised lip on a drain cover, but I weigh only 140 lbs.

Edit: I don't have wide rims though, only the standard 19mm wide.

[rnhood]

I run 25 Conti 4000 on DA wheels at 80# front and rear. Never flat. Superb ride. I weigh 180#. 80# is as safe as apple pie. At least on DA wheels it is.

[norcalbiker]

I was told by Reynolds Tech to put about 130psi on my 46. I weigh 165lbs.

I was also told by Enve Tech to put 125psi on my brother-in-laws Enve 45. He weigh 210lbs

[eddief]

and even at 85ish things seem nearly rock hard to me. i can barely imagine riding my tires inflated to 120. to each their own inflation :).

oh by the way, all the roads in Berkeley have just gotten a fresh coat of resin and been smoothed to the texture of a baby's bottom. so no worries in our fair city.

Do you ever have issues w/ destroying rims?

I nail potholes about once a month, and I'm always afraid of rim destruction. I've already bent a front, and I was running 100 psi. Granted, it was a pretty nasty raised lip on a drain cover, but I weigh only 140 lbs.

Edit: I don't have wide rims though, only the standard 19mm wide.

[don compton]

I have both Ardennes and some handbuilts with A23's. With my 700-25 vresdesteins, I run 75f and 90r. I weigh 170 and ride a heavy steel bike. I have never experienced a pinch flat or damaged rims with this combo. The ride and handling are great.
Don C.

[foo_fighter]

Are these carbon? clinchers? If you start at 130psi, how do you not exceed safe pressures on descents?

I was told by Reynolds Tech to put about 130psi on my 46. I weigh 165lbs.

I was also told by Enve Tech to put 125psi on my brother-in-laws Enve 45. He weigh 210lbs

[fourflys]

with the wider rim I'm sure you can get away with 90 rear/85 front.....

[ergott]

158lbs.

80 front and 85 rear.

Butter.

[xeladragon]

150lbs.

85/90.

[C5 Snowboarder]

I run 95 front and 100 back.. no reason other than I am pretty old and cant remember sometimes--- so those numbers are the numbers represent the range of age I hope to live to. BTW -- if I remember correctly yesterday I weighed 210 lbs. or 2.80 lbs per inch

[Lifelover]

250# generally run at 25 PR 2's at 100 psi and have no reservations running the front in the 80's and rear in the mid 90's

[weiwentg]

~120lbs. just under 80 rear, 75 front on 23mm rims.

[norcalbiker]

Are these carbon? clinchers? If you start at 130psi, how do you not exceed safe pressures on descents?

Yes they are both carbon clincher.

[bobswire]

147 Lbs, 90/95 Vittoria pave / corsa cx clinchers

[Steve in SLO]

185#
80f/85r on 23mm rims
85/90 on standard rims

[Jack Brunk]

164lbs slender and shy.

90 front 92-95 lbs rear
Using Conti GP4000 tubies.

[jmeloy]

I'm 190 and have been riding them at 100. Think I'll drop them 10 and see how they do!

[Kontact]

The Reynold's tech guy must have been joking.

Food for thought from Michelin:
http://www.michelinbicycletire.com/michelinbicycle/img/pressurechart121405B.jpg

[foo_fighter]

Yes they are both carbon clincher.
I hope you're not in a hilly area....Norcal is not flat. I would rethink those pressures especially on carbon clinchers. You're approaching 150-160 if the rim heats up to 200F.

[alancw3]

195# hed ardennnes friont 90 rear 95. of course what i do is pump to 95/100 and then can ride for three days w/o refilling.

[Nelson99]

(Aluminum rims only for me)

Pirated from various sources I will credit when I get back to my other computer. I also plan to modify (improve) an xl spreadsheet I found and will also post that and the original. For the moment I am trying the pressures calculated here to see how they work out for me.

I weigh ~210, figure total load at ~230

[oldpotatoe]

I was told by Reynolds Tech to put about 130psi on my 46. I weigh 165lbs.

I was also told by Enve Tech to put 125psi on my brother-in-laws Enve 45. He weigh 210lbs

They are just trying to protect the rims at the expense of a crappy ride, IMHO.

A real advantage to aluminum rims. I use 95 psi on my wet weather clinchers, DT 585, but if I kill one because of too low PSI(haven't happened in 4 years), new rim isn't $600+.

I weigh .1 offa ton.

Carbon rims are nice but you are saving maybe a pound or so(600 grams) over aluminum wheels. Where a 200 pound rider and 18 pound bike...1.5 divided by 218, carry the.....add the......subtract the.......

.6 of 1% difference?

Nope, not trying to start a carbon vs aluminum wheel argument...discussion group, I'm discussin'

[binxnyrwarrsoul]

200-ish
90 in front.
100 in back.

[Joachim]

They are just trying to protect the rims at the expense of a crappy ride, IMHO.

A real advantage to aluminum rims. I use 95 psi on my wet weather clinchers, DT 585, but if I kill one because of too low PSI(haven't happened in 4 years), new rim isn't $600+.

I weigh .1 offa ton.

Carbon rims are nice but you are saving maybe a pound or so(600 grams) over aluminum wheels. Where a 200 pound rider and 18 pound bike...1.5 divided by 218, carry the.....add the......subtract the.......

.6 of 1% difference?

Nope, not trying to start a carbon vs aluminum wheel argument...discussion group, I'm discussin'


someone once said clinchers are for nancy's..but i cant remember who that was or can I? :)

[oldpotatoe]

[QUOTE=Jack Brunk]164lbs slender and shy.


Likes classical music and quiet walks in the park.

[oldpotatoe]

someone once said clinchers are for nancy's..but i cant remember who that was or can I? :)

Yada, yada, one thing even I can't do is get a wet tubie to stick to a wet tubie rim and yes, I am a nancy in the rain.

[jr59]

[QUOTE=Jack Brunk]164lbs slender and shy.


Likes classical music and quiet walks in the park.

:banana: Very good!

I'm 245-250, I just pump them to about 90 or so! Keep in mind that I am using Schwalbe Mar. plus in that tire size.

When I'm going to load them up, as I am car free.

Add 50-75 lbs for a food run. Then I pump them up to the max on the sidewall.

[Chance]

The Reynold's tech guy must have been joking.

Food for thought from Michelin:
http://www.michelinbicycletire.com/michelinbicycle/img/pressurechart121405B.jpg
That seems a little high as if meant more for speed than comfort.

[Fixed]

90 ft -100 rear here
cheers

[tele]

80/85 here

[biker72]

I'm almpst 200 pounds with everything I carry. On 25's I'll run 100 on the rear and 90 front.

[Kontact]

That seems a little high as if meant more for speed than comfort.
I think it is mainly meant to prevent pinch flats. Michelin is unlikely to publish something that requires a specific kind of street or riding style to work, so these are "safe" numbers. Going below them may work, but not for everyone.

The main reason I posted it is to demonstrate how far off the Reynolds guy and some others are from reality.

[Wilkinson4]

On 19mm rims - 700cx28mm I am about 78/82. On my 650bx42mm, about 53/55, super comfy:D 145-150#.

On a 23mm rim I would start with what I run and then just field test it until I got the right ride/performance for me.

mIKE

[everbeek]

Vittoria Open Pave (24 mm) or Open Corsa (26 mm measured) on 23 mm rim. 90 front/95 rear. 240 pounds.