And now to tyres!

[andy230]

Hello,

The rear brake on the DR is all stainless piston, red grease and new seals.  Ready to fit.  Thanks for advice on this.

Now, I put a rear tyre on at the weekend.  Or rather, the tyre man at mallory park did it for me, cos I was there, and spent last saturday fighting with the front wheel, so figured I'd let him do it.

While putting it on, my mate noticed that the bead isn't seated correctly.  For about a quarter of the rim, the bead doesn't sit against the flange.  It is further inside the "well" of the wheel.

The effect of this is that the lower extreme of the lettering (ie. "Distanzia") appears to creep underneath the rim      

When I noticed, I deflated the tyre, freed up the rim (so that with the inner tube deflated all of the bead, on both sides, was in the well) and tried to reinflate.  No joy.  I repeated this a number of times (to about 15 or 20 psi), each time the bead would not seat all the way round. Hitting with mallets, persuasion with tyre levers did not sort it.

Am I doing something badly wrong?  I have never had this before, despite having changed tyres myself a few times before.  I cannot see a way of forcing it to seat- unlike a tubeless, I suspect that forcing more sir into the tube will not seat it.  Jethro...??!   JETHRO!!

So my plan is to toothbrush a bit of soap solution round the tyre and rim, then take it to an airline and push it up to 50 psi.  Or does anyone else have an idea before I need to cart the bugger into the bike shop on a bus/ tube/ take time off work.

So much for being cheap!!


cheers


a

[Steve H]

I bought a tub of tyre soap which was fairly cheap and it lasts forever. In the past I have used washing up liquid, but stopped when I noticed corrosion on the rims.

Steve

[Dr650rs]

Possibly not what you 'should' do, but when I used to fit my own tyres I'd pump them up to about 50psi and drop the wheel to the floor from about waist height, the impact would normally pop the tyre into place.



(however don't blame me if you try it and it goes bang! Never happened to me but spose it could)

[pigafetta]

Yup, that's the way I used to do it too. Never had one go BANG! either.

Dave B

[andy230]

Right....

Never had to do that, they always just seemed to seat ok.

In that case, I will soap it up, and give it 50+psi (no way will it go bang at that pressure) and bounce it.

I did this at 15-odd psi to no avail.  Will repeat this evening.

Thank you!

a

[Andy M]

50 psi cold won't do any harm, the burst pressure is going to be well over 100 psi, just don't ride it at this pressure and stand out of the way of the airline while inflating. Grease or soap makes a huge difference and is probably what your "professional" tyre fitter didn't want to bother having to clean up. Hand soap and the cheese grater makes perfect tyre soap without the rim rust associated with washing up liquid. I once used olive oil for a roadside tube change, no idea if that causes rust though.

Andy

[andy230]

Right

here's hoping!

a

[guest7]

I usually have to go up to 50+ psi to get a tyre to seat. The 'bang' still scares me though 

(remember it will probably go bang twice as it seats it on one rim then the other)

GC

[Richard]

1.  Olive oil will not cause rust but will rot rubber.

2.  KY Jelly works incredibly well and most Thumperistas will have a tube handy.  In all seriousness it works really well and does not rot rubber for obvious reasons.  Try it and be amazed.

Richard

[beamer]

hi andy,the rim / tyre bead definatly need lubricating but you may need to take the pressure well over 50 psi to get it to sit properly. as for the type of lubricant be carful what you use because if it doesnt dry out you run the risk of the tyre slipping on the rim, ripping the valve off which cause a very unpleasant experiance if you are doing 50mph. i dont want to scare you but please be careful.

[steveD]

Yeah, try not to use washing up liquid as it has salt in it, and we all know what that does to bikes.
You really do need to go to a garage and use a commercial air line and blow it up quickly. My small portable air compressor that I carry on my bike will give 40 psi easily but it's touch and go whether it will seat a tyre. But it is enough as a get you home, and yes I have done it in the 'field'.

[trophydave]

Go to your local garage/tyre place and scrounge some proper tyre soap,donate a packet of biscuits or something similar.As Steve says you want the tyre to inflate quickly,so remove the valve core if you can,then blow it up.OK it's going to go down when you take the airline off to refit the core but hopefully it should have seated.

[002]

Remove the valve core.
Lube the tyre/rim...but not with washing up liquid !
Tyre soap is silcone based.
Use your Renolit Red Rubber Grease if you have a tub.

Inflate the Thing not Bloddy Tickle it,,,15-20psi...POOF !
Take it upto 100psi,wont hurt it.

Without the Valve core it will inflate a lot quicker and that helps the process.

Jethro

[andy230]

Hello Gents.

Ok, I am going to solve the problem and tax the skorpion!!!   

Not very happy about it, but I always used to keep two bike taxed and MOT'd for just this type of problem.

I will re-commission the skorp tonight, and use that.  Bloddy tube is doing my nut in. (Although I have a good book...!)

Last night I soaped it up (sorry  ) and put 50psi in at the (20p a pop, tesco, slowly-slowly airline.  One side seated slightly better, but the other is just the same.  I tried it 3 times, and bounced it etc.  It was starting to get a bit deformed at 50psi, so I got a bit scared and didn't take it much higher...

Eventually went home. 

I on saturday I'll take the tyre off, clean up the rim, lub it and force it on.  I'll go see the tyre man and force air in quickly, without the valve in.

Cheers.  I said last time I changed the tyres that I was never doing it again.  What is my problem?? Too fcuking tight- I was trying to save a few quid, but have just ended up with a pain in the ass, using public transport, fighting with a tyre, wasting both time and money.  Grrrrrr!!

Ok, at least my house is still standing, no tidal wave of debris advancing at 60 mph, and no need for a geiger counter.  Actually, things are fine....

a

[Steffan]

I used to be very self reliant about stuff like this and when time permits and cash is tight will often relapse but generally I think of what Thomas More said

"If He suffers us to come to such a case that there is no escaping, then we may stand to our tackle as best we can, and, yes, Meg, then we can clamor like champions, if we have the spittle for it. But it's God's part, not our own, to bring ourselves to such a pass. Our natural business lies in escaping."

To sum up, if needs must then we'll have to get on and make do, if not, then let the the expert take the load. Broadly speaking.

Does that make any sense to anyone else apart from me?


Steff