new tyres didnt feel right

[Frank]

Last weekend I got my new tyres on my bike(whoopee),and they definatly
felt so much better.However 50 miles later they just didnt feel quite right.Ten minutes later at the fuel station I knew why.51 psi in the front and 55psi in the back.How can a profesional tyre fitter get it so wrong when it is printed on the chain guard.If they cant get somthing as basic as that right then god help us.
Does anyone on here have any idea how dangerous that amount of pressure is?

[neio79]

it diddnt go pop dont worry, no lasting damage. of course dont blame me if your tyres now pop on the ride out this weekend.

[Warthog]

Wow! Max load 42 usually!

[Drew Carey]

What rubber did you go for Rick?

[Biker_Billy]

Did you check the tyres cold, or straight after you hopped off the back from a 50 mile ride?

[kwak zzr]

oooo big psi bad :(

[Stig]

Did you check the tyres cold, or straight after you hopped off the back from a 50 mile ride?

Regardless, there would only be a couple of psi difference from warm to cold. Not 20 odd.

[Biker_Billy]

Regardless, there would only be a couple of psi difference from warm to cold. Not 20 odd.

True - but I was just interested to know - especially when he said that they felt so much better to start with...

Must have been overinflated when stone cold, but not to a degree that they were so noticable when ridden for the first few miles. Then the pressures build as they heated up, and the difference was felt?

[Stig]

Does anyone on here have any idea how dangerous that amount of pressure is?

You mean apart from the tyre not being able to flex properly when going round corners lent over ? Meaning an extremely high risk of the front washing out due to lack of traction? Nothing really. Any sort of distance and you would have worn out your tyre extremely quickly.

[Frank]

What rubber did you go for Rick?
that again is another story.Ordered 021s ,to be fitted on the Saturday.Any how my bike is stood there with no wheels or tyres on when the boss slinks his way up to me.Soz mate ,we erm ,seem to have sold your tyres to somebody else.I ended up with road attacks on instead,cant complain because they seem alright so far

[Frank]

True - but I was just interested to know - especially when he said that they felt so much better to start with...

Must have been overinflated when stone cold, but not to a degree that they were so noticable when ridden for the first few miles. Then the pressures build as they heated up, and the difference was felt?
they felt better because the old ones were really squared of,and I had lost a weight which caused a front wobble

[Biker_Billy]

ah...righty ho...

[DoubleD]

kwak knows all about over inflating your tyres, but thats another story.

should be fine once you have put the correct PSI in.

[thedonal]

Been there with an overdone back tyre (50psi)- not very safe.

Wait til you go to adjust the chain too- they probably did the rear bolt up with a drill. Tyre fitters can be f*ckers like that.

My Bro had this last month- took it back to them. They couldn't undo it with the drill they used to tighten it. So they had to undo the bolt with a pneumatic drill.

[Philbo]

I was told that the hight pressures were deliberate, to help the tyre form a good rim seal or something. Apparently your just "supposed to know" and adjust the pressures back to normal after some unknown amount of miles. That said, 50 psi sounds a teeny bit high even for that...

Now to wait and see if if i've been told a lot of coblers...

[kwak zzr]

kwak knows all about over inflating your tyres, but thats another story.

i know check them religiously :smt053

[Frank]

i know check them religiously :smt053
pls tell

[kwak zzr]

well to cut a long story short, i been riding like 15years and i went on NW rideout and put 42psi in my tyres like it said on the sidewall, whilst out i lost the front on a bend and ended up in a field backwards lol abit bust up:( not one to boast but ive been round corners tighter than that with my knee on the deck solid as a rock, i put it down to partly having a rock solid front tyre and no grip that and braking into the bend with hard tyres, i run at about 34 now, 7 months later and it still hurts :(

[kwak zzr]

see here-
http://forums.sv650.org/showthread.php?t=96747&highlight=field+trip

[Luckypants]

Now to wait and see if if i've been told a lot of coblers...

Yes you have. It might be necessary to over inflate the tyre slightly to get it to seat on the rim, but once seated the tyre pressures should be adjusted by the fitter to the correct value.

[monkey]

Name and shame time. There's no excuse for that.

[Sosha]

Things like that make you wonder if they did the bolts up properly...

[timwilky]

How did you measure the pressure to know it was over inflated. Please don't tell me that you used the gauge on the service station air line.

[Flamin_Squirrel]

Yes you have. It might be necessary to over inflate the tyre slightly to get it to seat on the rim, but once seated the tyre pressures should be adjusted by the fitter to the correct value.

Normally to about 40-50psi.

Until the tyre seats on the rim it'll leak though, so you have to fill to that pressure quickly. I don't know about the compressors at tyre fitting places, but when I've done my own tyres the only way to get the air into the tyre that fast is to remove the valve core. This means as soon as the tyre seats you remove the air line and all the air rushes out. As you have to replace the valve core before you can pump the tyre back up to correct presure, it's hard to inflate back to 50psi by mistake.

[Dicky Ticker]

I have to say that I had new tyres fitted recently and it wasn't till I over inflated them for a second time and rode it for a few miles to re-seat them that they stopped loosing a few pounds of pressure between checks. When I say over inflated them,my normal pressure is 36-42 but I bumped that up to 45-50 and did about 10 miles but I knew they were over inflated,thats the difference. They don't always seat correctly on the first inflation

[Drew Carey]

I had mine fitted last weekend. The garage did it to bang on the right PSI, plus, not lost a single drop since. Well chuffed

[thor]

I'm going to check mine when I get home!

[jambo]

As above, a big compressor will be able to infate a tyre fast enough to seal the beading with the valve core still in, but every decent tyre place I've been to has promptly dropped the pressures to the right levels before I've driven off.

[Luckypants]

I have to say that I had new tyres fitted recently and it wasn't till I over inflated them for a second time and rode it for a few miles to re-seat them that they stopped loosing a few pounds of pressure between checks. When I say over inflated them,my normal pressure is 36-42 but I bumped that up to 45-50 and did about 10 miles but I knew they were over inflated,thats the difference. They don't always seat correctly on the first inflation

My new tyres lost a few pounds after fitting but have been fine since correcting them. I suppose different tyres will need a different amount of pressure / riding to get them fully sealed.

What this goes to show is that regular checks (before every ride for a weekend rider like me) are essential. See the engine blow-up threads for further proof of this. :)

[petevtwin650]

Interesting reading.

My front always loses 3-4 lbs a week, so I'm constantly pumping it up prior to a ride.

I'll have to try the over inflating thing a couple of times. See if that cures it.

[monkey]

Following your post Pete I used to have to top up my air on a regular basis on the SV.

From doing a manual tyre change myself on a rear for my Daytona I took it to the local petrol garage, valve core in on the garage 20p pump, popped the bead on and that was that. No unexpected loss of pressure or anything untoward.
:)

[MavUK]

that again is another story.Ordered 021s ,to be fitted on the Saturday.Any how my bike is stood there with no wheels or tyres on when the boss slinks his way up to me.Soz mate ,we erm ,seem to have sold your tyres to somebody else.I ended up with road attacks on instead,cant complain because they seem alright so far

I'd say it's a blessing in disguise (the tyres, not the pressure :)). I've ran BT020's, BT014's and Dunlop Arrow Max over the last 8 years but the last time I changed I went to Conti Road Attacks after advice I got here and they are amazing... Lots of confidence in the rubber, and they haven't worn like 014's did either.

Can't believe the pressue though...

[Frank]

I'd say it's a blessing in disguise (the tyres, not the pressure :)). I've ran BT020's, BT014's and Dunlop Arrow Max over the last 8 years but the last time I changed I went to Conti Road Attacks after advice I got here and they are amazing... Lots of confidence in the rubber, and they haven't worn like 014's did either.

Can't believe the pressue though...
cheers mate.When it says near Amsterdam is that the one in the NL

[MavUK]

Yup, that would be the one. Maybe I should change my sig to MavNL... But it doesn't have the same ring to it :)

[Alpinestarhero]

blimey, thats bad :shock: i put my pressures up about 5 psi over recommended; feels better at higher speeds but a bit rough at low speeds

51 psi must have shaken you about a fair bit :shock:

Matt