Rene Herse SBH ELs with Pacenti Brevets, TL or TPU?

[jlaw]

Hello 650b,

I built a new wheelset using Pacenti Brevet rims and Sapim Race spokes in anticipation of using them on a new road bike I’ll be getting soon.  I had planned on using Switchback Hill Extralights tubeless.  650bx48. 

However, digging through the RH tech info. I found a 2/6/22 Jan Heine document showing a chart of approved/unapproved rims for use as tubeless with RH tires.  The Brevet was shown as not fully approved for tubeless because RH had measured the Brevet bead seat diameter as being .3mm less (with rim tape) than the ERTO standard of 584.1mm.  .3mm! 

 

https://www.renehersecycles.com/rim-and-tire-standards/

The last thing I want is a blow off at 35mph, but….

I already bought some very cool orange anodized tubeless valve stems with blingy caps!  ;)

Should I use TPU tubes instead - or just be blissfully semi-aware as I fly down that hill tubeless?

Opinions please.

Thank you!

jlaw

[Will Boericke]

No direct experience, but I have read a number of posts on the problematic nature of RH EL casing and tubeless setup / maintenance.  Of course, if a setup is working for you, you are unlikely to post about it, so that may be the reason.  But I feel the same way about TPU.  So, probably wait for someone with useful firsthand experience.

W

[carll...@gmail.com]

I set up Compass-labeled SBH TC ELs tubelss back in 2018.  On WTB rims.  They oozed slightly and then held fine.  My understanding is that newer RH casings have resolved this.  I successfully ran Compass 42mm BSPs tubeless on Pacenti brevet rims.  An extra layer of tape may allay your concerns.

I eventually abandoned tubeless on this one since I didn't want to maintain it during long periods of non-use.

I recently installed TPUs (RH 30-48mm).  The ride seems much improved but it could just be confirmation bias.  Regardless, I enjoy the bike more now than pre-TPU.

I'm sticking with TPU and will add sealant if I stray into goathead country.

Carl Lind

Anacortes WA