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rear tire size & quick changes on '99 Specialized Allez Ultegra

post #1 of 2
Thread Starter 
I have a 1999 Specialized Allez Ultegra that I purchased
used in excellent condition about a year ago. The rims are
Mavic CXP23 (622x15 6106) and the tires that were on the
bike were Specialized Turbo 700x23. I didn't receive an
owners manual.

What I've found when after fixing a rear flat is I can't
air up the rear tire before placing(mounting) the tire
back on the bike. What happens is the tire hits the cross
piece, connecting the two chain stays, behind or to the
rear of the down-tube prior to getting the axle/quick-
release into the drop-out brackets. I end up having to
place/mount the fixed flat tire without air on the bike
and then airing the tire up.

I've had the same problem with the following tires as
well: Continental Grand Prix 4 season 700x23 Michelin Pro
Racer 700x23

I've talked to the LBS and they indicated tolerances on
bikes with tires and frames are very small and
sometimes this happens and you have to air up the tire
after its placed back on the bike (the LBS didn't sell
the bike to me).

I called Specialized and spoke with a person there who has
the exact same bike. He said he doesn't have this problem
and explained the measurements on tire sizes (e.g. 700x23)
can vary from brand to brand. He indicated he uses a
Specialized Armadillo 700x23 and is able to change the rear
tire and place it back on the bike when its fully aired.

Does anyone have any experience with this particular bike,
or suggestions? Can anyone else confirm similar experiences
with the Armadillo tire that Specialized indicated?
post #2 of 2

Re: rear tire size & quick changes on '99 Specialized Allez Ultegra

biker019283 wrote:

> I have a 1999 Specialized Allez Ultegra that I purchased
> used in excellent condition about a year ago. The rims are
> Mavic CXP23 (622x15 6106) and the tires that were on the
> bike were Specialized Turbo 700x23. I didn't receive an
> owners manual.
>
> What I've found when after fixing a rear flat is I can't
> air up the rear tire before placing(mounting) the tire
> back on the bike. What happens is the tire hits the cross
> piece, connecting the two chain stays, behind or to the
> rear of the down-tube prior to getting the axle/quick-
> release into the drop-out brackets. I end up having to
> place/mount the fixed flat tire without air on the bike
> and then airing the tire up.
>
> I've had the same problem with the following tires as
> well: Continental Grand Prix 4 season 700x23 Michelin Pro
> Racer 700x23
>
> I've talked to the LBS and they indicated tolerances on
> bikes with tires and frames are very small and
> sometimes this happens and you have to air up the tire
> after its placed back on the bike (the LBS didn't sell
> the bike to me).
>
> I called Specialized and spoke with a person there who
> has the exact same bike. He said he doesn't have this
> problem and explained the measurements on tire sizes
> (e.g. 700x23) can vary from brand to brand. He indicated
> he uses a Specialized Armadillo 700x23 and is able to
> change the rear tire and place it back on the bike when
> its fully aired.
>
> Does anyone have any experience with this particular bike,
> or suggestions? Can anyone else confirm similar
> experiences with the Armadillo tire that Specialized
> indicated?

Presumably you have horizontal dropouts? I've had this
problem on a bike where the dropouts were replaced by a
framebuilder for ones of a slightly different design
(shorter). You'll just have to experiment with different
tyres if a quick change is really important to you.
Sometimes a wheel will go in with a good thump of the hand,
although this does tend to scuff up the paintwork a bit.
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