Groove between tire and rim - silicone or latex or ?

Discuss light weight issues concerning road bikes & parts.
alcatraz
Posts: 920
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Hey

I'm interested in filling the groove with something. What have you who have tried this used with good results? I'm thinking transparent and something that doesnt fall off from normal riding easy.

I hardly ever have any flats so for me if the stuff adheres well enough to stay there a few years the better.

Cheers! /a

mattr
Posts: 3501
Joined: Fri May 25, 2007 6:43 pm
Location: The Grim North.

by mattr

Shoe goo?

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Lelandjt
Posts: 418
Joined: Tue Jan 19, 2016 7:10 am

by Lelandjt

Clear silicone bathtub sealant. I'm intrigued but get just enough flats that I don't think I'll try it.

jih
Posts: 129
Joined: Fri Jan 29, 2016 12:54 pm

by jih

might be worth a try if you're running tubeless. Advantage if it is black.

kulivontot
Posts: 1170
Joined: Sun May 16, 2010 7:28 pm

by kulivontot

Is the application for aero? Or what purpose does this serve?

mrtkcmz
Posts: 54
Joined: Wed Jul 15, 2015 5:00 pm

by mrtkcmz

once it is illegal for UCI. Does anyone knows if its still?

kode54
Posts: 1184
Joined: Tue May 23, 2006 9:39 pm

by kode54

you would think that the tire companies would have a rim lip to fill the gap...just like they make lips on car tires to prevent the rim touching the curb.

but i suppose all the rim lips are different in size and thickness.
- AX Lightness Vial EVO D + DA9150 + Enve SES 3.4 carbon hubs
- Parlee Altum + DA9150 + Enve SES 4.5 carbon hubs
- Parlee ESX + DA9150 + THM SRM PM + Enve SES 6.7 CK hubs
- Independent Fabrication Ti FLW + DA9100 + Enve 3.4 CK hubs

AJS914
Posts: 2003
Joined: Tue Jan 28, 2014 6:52 pm

by AJS914

What are you going to save? 1 watt? It sounds like a giant mess.

em3
Posts: 888
Joined: Tue Dec 23, 2008 2:57 pm
Location: NYC

by em3

Mavic had/has such a product, called the aero "blade" albeit UCI banned its use.

http://road.cc/content/news/84050-mavic ... ero-blades


https://cycletechreview.com/2012/news/m ... isallowed/

As for using silicone or other to fill gap in search of aero savings, seems like a fools errand....no offense.
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alcatraz
Posts: 920
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Thank you for all the replies.

I know it's not uci approved. Just about to build a nice deep wheelset and thought I shouldn't overlook such a simple mod to improving the shape.

I remember when doing tilework in the kithen/bathroom that some of these gap fillers are quite elastic and would probably do ok in moving with the tire/rim flex. Only the color might not fit hehe.

/a

alcatraz
Posts: 920
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

I'll try the clear silicone sealant that was suggested. I'll report back in a few weeks and let you know how it went.

/a

chris47
Posts: 98
Joined: Thu Apr 10, 2014 11:06 pm

by chris47

Well, I used some silicone to fill the gap, and that stuff is pretty durable. I was able to change tubes without it getting torn up but it was hard to seat it properly when inflating the tube again. It was a major pita to get it off the tire, so look at it as a permanent mod :)

TheKaiser
Posts: 496
Joined: Thu Sep 05, 2013 3:29 pm

by TheKaiser

em3 wrote:Mavic had/has such a product, called the aero "blade" albeit UCI banned its use.

http://road.cc/content/news/84050-mavic ... ero-blades


https://cycletechreview.com/2012/news/m ... isallowed/

As for using silicone or other to fill gap in search of aero savings, seems like a fools errand....no offense.


Maybe a fools errand, but I recall seeing Contador's mechanic doing this in some of those TDF TT tech galleries from several years back. That was with tubulars of course.

The Mavic blade may be disallowed, but are you aware of anything specifically banning this silicone caulk strategy? I would think that, particularly on a tubular, it would be difficult for the UCI to determine if that it was simply an aero mod as it could also help tire retention, and prevent water getting into and weakening the tire/rim bond.

mrtkcmz
Posts: 54
Joined: Wed Jul 15, 2015 5:00 pm

by mrtkcmz

what if a company makes a "clincher" or a "tubular" tire with that shape for specific wheel widths? will it be still UCI illegal?

rpowell
Posts: 37
Joined: Tue Sep 10, 2013 12:47 am

by rpowell

dont the cross guys seal their dugast sidewalls with aquaseal? urethane should hold up better in this application than silicone.

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