Tyre inserts/foams

gazz

New Member
Oct 1, 2018
20
14
north wales
i have made my own,15mm pipe insulation,cut in half ,wrap with insulating tape every inch,it will take two lengths ,fix together with a zip tie,measure and cut to length connect with second zip tie ,and place in tyer,easy fit,cost £2,works will,i added stans sealent,i have tested this by running no preasure on grass ,fantastic
 

galaga187

E*POWAH Master
Apr 15, 2018
796
597
Wroughton
i have made my own,15mm pipe insulation,cut in half ,wrap with insulating tape every inch,it will take two lengths ,fix together with a zip tie,measure and cut to length connect with second zip tie ,and place in tyer,easy fit,cost £2,works will,i added stans sealent,i have tested this by running no preasure on grass ,fantastic
Ghetto tech - I salute your ingenuity ?
 

steve_sordy

Wedding Crasher
Nov 5, 2018
8,443
8,691
Lincolnshire, UK
i have made my own,15mm pipe insulation,cut in half ,wrap with insulating tape every inch,it will take two lengths ,fix together with a zip tie,measure and cut to length connect with second zip tie ,and place in tyer,easy fit,cost £2,works will,i added stans sealent,i have tested this by running no preasure on grass ,fantastic

Very resourceful.
What do you mean by cut in half?
 

gazz

New Member
Oct 1, 2018
20
14
north wales
cut it length ways down the middle,there is a slot for the pipe use this slot to make the cut lengthways,i found it too big to fit inti a 2.6 butchers tyer and so i used the tape to make the foam narrower ,it then fits easy,the stans sealent doesnot soak into the foam
 

RRebikes

Member
Jan 4, 2019
33
15
Norway
there is 3-4 people around here including me, that use this insert, works very well and the price is low.
riped a hole on the side wall of my tire, and rode almost 100 meter without any air inside, and rim was not in touch with the ground
Barbieri Anaconda 27,5
 

steve_sordy

Wedding Crasher
Nov 5, 2018
8,443
8,691
Lincolnshire, UK
cut it length ways down the middle,there is a slot for the pipe use this slot to make the cut lengthways,i found it too big to fit inti a 2.6 butchers tyer and so i used the tape to make the foam narrower ,it then fits easy,the stans sealent doesnot soak into the foam

So that you have two semi-circle cross section lengths of pipe insulation? I assume that you put the open side into the rim and not the other way around? Does it even matter?
These may seem dumb questions, but I've never seen a foam insert so I have no picture in my head to help me interpret what you write.
 

Indigo

Active member
Oct 6, 2018
214
178
Brisbane, Australia
The foam insert material needs to be a high density Closed-cell polymer. Hot water pipe insulation will be low density because more air volume means better thermal efficiency.

CushCore, Vittoria Air-Liner, etc. use a Closed-cell polymer and are therefore expensive. IMHO: the cheap options are rubbish.

IMHO: CushCore is the superior design; it really holds tyre hard against rim (to prevent burping), provides similar sidewall support (for running lower tyre pressures) and retains more tyre air volume so that the tyre can work as designed (conforming to shape ground for maximum grip).
 
Last edited:

Kernow

E*POWAH Elite World Champion
Patreon
Founding Member
Jan 18, 2018
1,436
1,149
Cornwall uk
Been using rat bites for a year now , well proven , cheapest lightest and for me so far 100% effective . They allow me to run a much lighter rear tyre , when I changed my tyre a while ago it was obvious they had saved my rear tyre at least 7 times

50E4BCEE-6236-4623-9665-64FEEF55086F.jpeg
 

bikerider007

Active member
Nov 7, 2018
147
119
Norfolk
cut it length ways down the middle,there is a slot for the pipe use this slot to make the cut lengthways,i found it too big to fit inti a 2.6 butchers tyer and so i used the tape to make the foam narrower ,it then fits easy,the stans sealent doesnot soak into the foam

I like to see some pictures of your setup next time you have them off..
Cheers..
 

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