cjenrick

the bike shop guy says we sell 48mm presta valves because they work for a lot of different rims,

i can grasp this notion of inventory control, but having 3 feet of valve stickin out seems lame, like havin a tire weight on there,

heck, i am used to about a 24 mm in the old days, the smooth ones, good luck finding those,

anybody have a source for 700C 23 to 28 tire size with a 36mm stem? use to et the Bontragers at the Trel shop but no more.

thanks for any help!

momoman

I bought some Kenda 700x20-28c 33mm presta valves with removable cores last year but don’t remember from whom. They have the Kendas on EBay and Modernbike.com, and probably many other retailers. They make 32mm and 33mm versions, and some with removable valve cores.

Theres a seller on EBay selling 2 with free 4-day shipping for $13.50, with discounts if you buy more. There may be cheaper sellers out there.

styggno1

Guess I am not alone in this then...

Wrote about it earlier:
Solving first world problems

cjenrick

no, your not alone, in fact, i use the same rim and believe this to be the same truing stand from around 83 maybe?
by any chance do you also listen to the Laterne Rouge podcast?

the rim is a bit heavy but once you get it rolling it is alright, and you could drive a tank over that thing,

Rooney 

Panaracer offers 33mm presta valves.

bOsscO

Would 42mm be acceptable to you? https://www.chainreactioncycles.com/.../rp-prod182842

bertinjim 

cjenrick-

Cycles Grand Bois in Japan sells Panaracers in 32 -34 mm Presta valve sizing. They have light weight and standard tubes. Shipping is comparatively fast in these COVID days. https://cyclesgrandbois.com/SHOP/T700_T23.html

SurferRosa

36? I always buy 'em with 32mm valve stems.

jaxgtr

Performance Bike has shorter stems, 35, 37, 40 mm

https://www.performancebike.com/700c...7_2862&lg=fa17

cjenrick

Thanks for the help! i punched in 32 mm instead of 36 mm on evilbay and was happy to see a whole slew of offerings,

my mistake was thinking that Bontrager set the short valve standard with their 36 mm tube, now i see that they just wanted to be different,

those Panracer tubes look like the way to go, think i will stockpile just in case this tubeless thing becomes standard,

EVlove

Zombie thread alert. I spent some time recently looking for shorter valves and found them at Walmart, of all places. 700c/25-32mm, the only size they carry at mine, with a 32mm Presta. Made in China by CST.

Drillium Dude 

I noticed that nobody in the first go-around suggested investing in patch kits

DD

Bad Lag

No, you are not. It hacks me off, too.

I went looking at McMaster-Carr.

They have taps in this size from $8 to $30. I mention a $30 tap only because it is specially designed to clear chips OUTWARD, rather than inward. Honestly, I think a regular tap ($8) is more than sufficient if the stem is held vertically during the tapping operation. Remember, cut and retract, cut deeper, then retract,... it's both easier, cleaner and helps pull shavings out.

There is always some excess mass at the rim seam which gets counter-balanced by the mass of the valve. It would be good to trim the stem to the length that exactly offsets the seam's mass.

The idea of making what they seem to refuse to sell appeals to me greatly.

Andrew_G

Giant also provides butyl tubes with 32-34mm valve length, although they're of 'standard' weight.

I wanted lightweight butyl tubes with a 32-34mm valve, and the Panaracer R'Air tubes fits the bill quite nicely. The Ri'Air tube uses a proprietary, very stretchy rubber, which makes the tube a smaller diameter than typical. This makes carrying a spare tube a bit easier, since it's a smaller size within my seat bag.

Distributor Panaracer USA carries the R'Air tube with 34mm valve in a 700 x 31-34mm size, but not in the 700x 23-38 size I wanted. So, earlier this year (2022), I bought 6 R'Air tubes (34mm, 700 x 23-38) directly from Cycles Grand Bois in Japan. The tubes were 'fresh', with a January & February 2022 manufacturing date code.

Jitensha Studio in Berkeley, CA also had some R'Air tubes available, but I don't know how 'fresh' their stock is.

Andrew_G

Kabuki12

I get 33mm stem length from Trail This on the bay . I just bought six more and it is about $11 per pair for Kenda- free shipping (how do they do that?) . I patch tubes when they get sticker punctures but I have ....hmmm...... a few bikes and I ride a lot where goat head thorns charge a toll to pass! This year has been very bad.

Kabuki12

I sometimes patch on the road unless I'm with my buddies . I always patch when I get home. At about 5-6 patches ....I'm done! Not that I've tried it , but I have heard that some cut the tubes up for heavy duty rubber bands. I only carry one spare tube and usually it has at least one patch. This year I have added a few bikes so I was low on new ones and as was said the local bike shops have those really long ones. I was shocked that the LBS (my favorite) actually had Velox cloth rim tape , now THAT'S a good day!

Dfrost 

I’ve used these Michelin tubes for years with great success. I prefer the unthreaded stems. I spent more on a few extra light Schwalbe tubes from RH, and they weren’t all that much lighter than then the Michelins.

https://www.universalcycles.com/shop...ls.php?id=4608