beaded edge tyre safety

[huw.parsons]

Knowing that beaded edge tyres will come off their rims in the event of a burst inner tube or hitting a large pothole
I've been running my 2.5"and 3" tyres with motocross extra heavy duty inner tubes and 42psi.

Does any one know if tyre security bolts will help if I should suffer a puncture?
I'm wondering if perhaps three evenly spaced round the rim would help? or are they designed just for wired rims?
Can't quite imagine how easy or hard it would be to fit a tyre and tube to a rim so equipped..

Anyone have any ideas?
Nev? Aidrie?

Cheers

Huw

[adrie.degraaff]

I had a heavy accident with a beaded edge front tire so will not use them anymore, better use the optional wire rims.
If you use 3 or more tire clamps you have to drill holes in your rims.
Wire rims and tires that size are still forsale for small German motorcycles, you"ll have to make the 36 hubs.

[nevhunter]

They need a high pressure to ensure they stay firm in the bead. 40 psi. (less on the big section "balloon" tyres whioch worries me a little). Don't stretch them putting them on or they are ruined Chrome or nickel plate makes the rims slippery and you can tear the valve out with instant deflate. I DON"T wind the small nut down allowing the valve to tilt if it slips on the rim, and you can deflate the tyre and correct it. I fit one security bolt . I have seen more on older (original) rims that might have been used in competition, but it would make fitting the tyre very difficult. (It's already hard enough)
There are many different section rims for different tyres way back. CARE needs to be taken with rim condition and type. There are some rims from rickshaws that I would not consider safe.
To stop the tyres slipping on the rims , I believe that sometimes Shellac and metho solution was applied (same as French polishing). under the bead. The main risk is slipping and tearing the valve out. Without a front brake this applies to the rear wheel primarily. I still ride on them, but take extra care with pressures and oil getting on the back wheel. I think any flat tyre can go close to rolling off the rim when deflated. Nev

[Wali.Badger.Taylor]

fitting one security bolt is a bitch, I would hate to try three. The last time I had to do the job the friction between rubber and my skin was only relieved by the blood from my ripped flesh. Huw i think it is better to try and keep the tyres inflated and to do so I would use a product called "Slime", you put it in your tyres and it seals punctures.
Get the right grade fore tubed tyres and it works. I took a rear off and found evidence of four punctures but never deflated with a slime filled tube.

[nevhunter]

It won't work if the valve is pulled out of the tube. Thais is the biggest worry as far as I can see'. There was a product called "Fenelec" that I used with success, until a while later the tubes disintegrated (Both on the same day, Front and rear wheels) and they went flat at a good speed so I had a bit of excitement there.. Not sure that sort of stuff is legal here now.. Nev

[john.bebb]

Hi there - A "Security bolt" may be fitted - this only prevents the tire rotating within the rim-well and thus (theoretically) prevents movement of the inner tube which may rip the valve out. They are normally used by motocross & trials riders who require low inflation pressures to achieve decent traction for their sport - the low pressures reduce the grip of the tire beads to the sides of rim-well.
Should you fit a security bolt - the wheel will require considerable balancing to compensate. To attempt to fit multiple security bolts is little short of insanity. Much as we may all love and cherish our Ariel classics - I do not think there were any produced which had the power to spin the rim in a correctly pressured tire!

[Knud.Degnbol]

Or you could pull the valve out through a hole in the side of the tyre. It has been seen!
Mostly on speedway machines.

[tony.barnett]

I don't know of anyone using security bolts on beaded edge Huw. Maybe ask Dennis Beale or Dave Miller? I wouldn't be shy with the tyre pressure too - beaded edge needs a lot more pressure than wired on, as you know. Check em regularly.

[huw.parsons]

Thanks for that everyone, I'll investigate further. I Like your Idea of slime Wali but not sure if it would work with the valve pulling out or a decompression due a pothole.. Might be belt and braces though.
I hear what you are saying about fitting a tyre with three bolts in the rim Nev. I've never used a security bolt so
no idea how much harder it would be to fit a tyre, I can imagine it's a bit of a fiddle though!
I've been running both my beaded edge tyre bikes at 42 psi but further reading last night suggests 40 as the absolute bare minimum, 60 being more desirable.
I'll do some more investigation and also give Dennis and Dave Miller a ring Tony.
I don't really want to re-rim the bikes for wired edge tyres but it's becoming obvious there is a fine balance between
originality and safety

Thanks all

Cheers

Huw

[nevhunter]

Huw , I'm not recommending putting 3 security bolts in a beaded edge rim . I'm only stating I have had complete wheels that have had then fitted obviously for competition. I can't imagine how you would get the tyre on. It's hard enough with NONE. I have a few bikes I use that are still running them. The shellac solution was used in the olden days, to glue the tyre to the rim.. The problem of slipping on the rim is not new.
Good fit in bead (correct rim for tyre) and good condition tyre and rim. Don't stretch the tyre putting it on, or it is useless. Use higher pressures 40+ psi unless balloon type (385 section). I'm not saying I'm in love with them particularly on a heavy bike. You could stillget a NEW Harley VL with them in 1932. Nev