tubeless valve length vs rim depth

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ooo
Posts: 1590
Joined: Sat May 21, 2016 12:59 pm

by ooo

Can I use 44mm tubeless valve with 38mm tubeless ready road rim?

How long must be tubeless valve for deep rim ?
'

Marin
Posts: 4035
Joined: Wed Jan 22, 2014 11:48 am
Location: Vienna Austria

by Marin

It will stick out 6mm - you have to know if this is enough.

It must be long enough for the pump to attach.

by Weenie


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jeffy
Posts: 1325
Joined: Sun Oct 05, 2014 11:51 pm

by jeffy

no.

you can just about use 44mm with 30mm rims. 40mm valves with 30mm rims only just fit, and you have issues with the pump clamp holding on.

JeffChen
Posts: 13
Joined: Fri Dec 06, 2013 2:23 pm

by JeffChen

That`s ok.

I used 60mm valve for 58mm zipp 404 clincher.

grover
Posts: 1302
Joined: Mon Jul 26, 2004 1:06 pm

by grover

I think it could work if you have a pump that threads onto the valve. That risks unscrewing the valve core (if it's a removable one) when you unscrew the pump each time. If you have a pump that just clamps on I don't think you'll have enough exposed valve for a good seal. You'll probably make it work but it might need holding on the whole time.

I'd use the 55mm valves
http://www.notubes.com/Universal-55mm-T ... P1773.aspx

or the 35mm valves and a set of threaded valve extenders
http://www.notubes.com/Universal-35mm-M ... -P550.aspx
http://www.notubes.com/Pair-of-40mm-Thr ... -P611.aspx

ooo
Posts: 1590
Joined: Sat May 21, 2016 12:59 pm

by ooo

I don't want to have extenders. I'd like to use any pump (thread, no thread, adapter to schrader)

I found PDF on DT Tubeless Solutions page:
Valve to convert compatible DT Swiss MTB wheels to tubeless. Road.

32mm valve = 21mm rim (RR 21 DICUT) + 11mm
32mm valve = 23mm rim (R 23 / 24 SPLINE) + 9mm
40mm valve = 28mm rim (RC 28 SPLINE) + 12mm
40mm valve = 32mm rim (R 32 SPLINE) + 8mm
53mm valve = 38mm rim (RC 38 SPLINE) + 15mm
63mm valve = 46mm rim (RC 46 SPLINE) + 17mm
63mm valve = 55mm rim (RC 55 SPLINE) + 8mm
73mm valve = 65mm rim (RRC 65 DICUT) + 8mm

stan have cone rubber below + no rubber o-ring on top
dt have flat rubber below + o-ring rubber on top
but i'd like to have o-ring or cone rubber below + o-ring or other rubber on top, so I will look for other brands
'

mimason
Posts: 654
Joined: Tue Feb 24, 2009 11:43 pm
Location: Florida

by mimason

JeffChen wrote:That`s ok.

I used 60mm valve for 58mm zipp 404 clincher.


Humor me. How do you pump these up with roughly 2mm exposed.

grover
Posts: 1302
Joined: Mon Jul 26, 2004 1:06 pm

by grover

For the record, the notubes valves and their threaded valve extenders ends up functioning as a normal valve. You remove the core from the valve, thread the valve extender into the valve, then thread the core into the valve extender. Usable with any pump and adaptor. Obviously you need to be careful if your pump or adaptor threads onto it as you could unscrew the removable valve core when removing the pump or adaptor. But that issue is present with a standalong valve with removable core too.

savechief
Posts: 354
Joined: Wed Aug 31, 2011 2:36 am

by savechief

You can't calculate the amount of exposed valve stem by subtracting rim depth from the valve stem length. The base of the valve stem doesn't rest at the outer diameter of the rim.

I use 48mm valve stems with my Enve 3.4 SES wheelset and it works fine. Not a lot of exposed valve stem on the rear, but enough to secure the pump head.

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wheelsONfire
Posts: 6280
Joined: Mon Jul 07, 2014 8:15 am
Location: NorthEU

by wheelsONfire

ooo wrote:Can I use 44mm tubeless valve with 38mm tubeless ready road rim?

How long must be tubeless valve for deep rim ?


My No tubes Avion came with 55mm tubeless valves.
Avion is 40.6mm deep.

Bought these before i got the wheels and they are too short

http://www.effettomariposa.eu/en/produc ... ess-valve/
Bikes:

Ax Lightness Vial EVO Race (2019.01.03)
Open *UP* (2016.04.14)
Paduano Racing Fidia (kind of shelved)


Ex bike; Vial EVO D, Vial EVO Ultra, Scott Foil, Paduano ti bike.

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otoman
Posts: 553
Joined: Wed Sep 17, 2008 6:25 pm
Location: Nashville

by otoman

mimason wrote:
JeffChen wrote:That`s ok.

I used 60mm valve for 58mm zipp 404 clincher.


Humor me. How do you pump these up with roughly 2mm exposed.


He has Zipp clinchers, not tubeless -- so I'm assuming he is meaning a 60mm extender on top of a standard length inner tube valve stem. :smartass: I agree, no way you could do that tubeless
Age and treachery shall overcome youth and skill

bm0p700f
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by bm0p700f

this should not even need to be asked. you pump has to attach and 20mm sticking out is more than enough for that. So for 38mm depth have a 60mm long valve then any pump to hand will work shorter only some pumps will work. At 6mm very few to none will work.

dvdslw
Posts: 75
Joined: Sun Nov 03, 2013 3:13 am

by dvdslw

I have 38mm deep EC90SL carbon rims from Easton that came with 60mm tubeless stems.

ooo
Posts: 1590
Joined: Sat May 21, 2016 12:59 pm

by ooo

bm0p700f wrote:this should not even need to be asked. you pump has to attach and 20mm sticking out is more than enough for that. So for 38mm depth have a 60mm long valve then any pump to hand will work shorter only some pumps will work. At 6mm very few to none will work.

30.5 mm - measured depth of presta valve hole on my 38mm rim
17 mm - measured valve sticking out length on my other wheeel
valve with 48mm insert part (not counting rubber part height) should be enough
'

by Weenie


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