Braking power with new rims

I just got a new bike and it came with Mavic CXP22 rims - the rims with the
wear indicator groove on the rim's wall. I've noticed that the brakes
(Tektro) on this bike don't stop anywhere near as well as the Shimano 105
brakes did on some old crappy Alex rims that were on my old bike. Is the
presence of the groove on the CXP22's probably contributing to this poor
braking?

Thanks,

Jean

Jean wrote:
I just got a new bike and it came with Mavic CXP22 rims - the rims with the
wear indicator groove on the rim's wall. I've noticed that the brakes
(Tektro) on this bike don't stop anywhere near as well as the Shimano 105
brakes did on some old crappy Alex rims that were on my old bike. Is the
presence of the groove on the CXP22's probably contributing to this poor
braking?

I wouldn't think so, Jean, but I could be wrong.

Do you still have the old bike? Could you swap brake pads?

Maybe you could ask at the LBS for some preloved brake pads that you
could try before buying some better brake blocks?

I've not seen the wear indicator groove. Is it in the middle of the
brake surface? Would the brake pad wear and end up with a wear profile
that matches the rim (and wear the wear indicator groove)?

--
JS.

On 7/6/2011 9:10 PM, Jean wrote:
I just got a new bike and it came with Mavic CXP22 rims - the rims with the
wear indicator groove on the rim's wall. I've noticed that the brakes
(Tektro) on this bike don't stop anywhere near as well as the Shimano 105
brakes did on some old crappy Alex rims that were on my old bike. Is the
presence of the groove on the CXP22's probably contributing to this poor
braking?


I have those rims and don't notice any problems braking. I have Shimano
105 brakes
though.

On Jul 7, 2:10*am, "Jean" wrote:
I just got a new bike and it came with Mavic CXP22 rims - the rims with the
wear indicator groove on the rim's wall. I've noticed that the brakes
(Tektro) on this bike don't stop anywhere near as well as the Shimano 105
brakes did on some old crappy Alex rims that were on my old bike. Is the
presence of the groove on the CXP22's probably contributing to this poor
braking?

Thanks,

Jean

No. Clean the rims with methylated spirit (or whatever you have for
degreasing) and bed in the blocks (pads) using glasspaper wrapped
around the rim facing the block to be cut. Keep going until all
shinyness is removed from the pad's surface and the face is completely
parallel to the rim upon closure.

In article ,
says...


I just got a new bike and it came with Mavic CXP22 rims - the rims with
the
wear indicator groove on the rim's wall. I've noticed that the brakes
(Tektro) on this bike don't stop anywhere near as well as the Shimano
105
brakes did on some old crappy Alex rims that were on my old bike. Is the
presence of the groove on the CXP22's probably contributing to this poor
braking?

Thanks,

Jean




The stopping issue is not caused by the rims. Problem is the Tektro brakes,
there's a reason why they're cheaper. You might find some improvement
by using Kool-stop or Swiss-stop pads. Used Ultegra 6600 brakes are down
to about $50 a set, well worth it and stop almost as good as Dura-Ace.

Rick

"James" wrote in message
...
Jean wrote:
I just got a new bike and it came with Mavic CXP22 rims - the rims with
the wear indicator groove on the rim's wall. I've noticed that the brakes
(Tektro) on this bike don't stop anywhere near as well as the Shimano 105
brakes did on some old crappy Alex rims that were on my old bike. Is the
presence of the groove on the CXP22's probably contributing to this poor
braking?

I wouldn't think so, Jean, but I could be wrong.

Do you still have the old bike? Could you swap brake pads?

Maybe you could ask at the LBS for some preloved brake pads that you could
try before buying some better brake blocks?

I've not seen the wear indicator groove. Is it in the middle of the brake
surface? Would the brake pad wear and end up with a wear profile that
matches the rim (and wear the wear indicator groove)?

--
JS.


The ~2mm wide indicator groove is nearly in the middle of the rim sidewall
(which is ~9mm high).

The groove is shredding the brake pads- after every ride I have to wipe off
the debris from the stays. I'm guessing that this will keep on happening
because the edges of the groove are sharp and it would be impossible to
perfectly true the rim so that the groove doesn't wander a bit with respect
to the brake pads.

"Duane Hebert" wrote in message
...
On 7/6/2011 9:10 PM, Jean wrote:
I just got a new bike and it came with Mavic CXP22 rims - the rims with
the
wear indicator groove on the rim's wall. I've noticed that the brakes
(Tektro) on this bike don't stop anywhere near as well as the Shimano 105
brakes did on some old crappy Alex rims that were on my old bike. Is the
presence of the groove on the CXP22's probably contributing to this poor
braking?


I have those rims and don't notice any problems braking. I have Shimano
105 brakes
though.


Do you notice a lot of brake pad debris on the bike from the groove
cutting/shredding the pads?

Jean

On 7/7/2011 8:02 AM, Jean wrote:
"Duane wrote in message
...
On 7/6/2011 9:10 PM, Jean wrote:
I just got a new bike and it came with Mavic CXP22 rims - the rims with
the
wear indicator groove on the rim's wall. I've noticed that the brakes
(Tektro) on this bike don't stop anywhere near as well as the Shimano 105
brakes did on some old crappy Alex rims that were on my old bike. Is the
presence of the groove on the CXP22's probably contributing to this poor
braking?


I have those rims and don't notice any problems braking. I have Shimano
105 brakes
though.


Do you notice a lot of brake pad debris on the bike from the groove
cutting/shredding the pads?

Not so far. I have about 5000 km on the bike. I've replaced the pads
once at the beginning of this season. Probably didn't need to but was
doing a tune up anyway. So I don't see any excessive wear either. What
kind of pads do you use?

"Jean" wrote in message
ecom...
I just got a new bike and it came with Mavic CXP22 rims - the rims with the
wear indicator groove on the rim's wall. I've noticed that the brakes (Tektro)
on this bike don't stop anywhere near as well as the Shimano 105 brakes did on
some old crappy Alex rims that were on my old bike. Is the presence of the
groove on the CXP22's probably contributing to this poor braking?

Thanks,

Jean


From my experience, Tektro brakes are good value but their brake pad material is
not so hot which will be the cause of your troubles. Don't mess around with the
pads you have. Their rubber-shedding habit is the fault of the pads. KoolStop
shoes are best. Genuine Shimano 105 or Ultegra will do if you can't find
KoolStop.
http://www.amazon.com/Kool-Stop-Bicy...owViewpoints=1
PH

"Duane Hebert" wrote in message
...
On 7/7/2011 8:02 AM, Jean wrote:
"Duane wrote in message
...
On 7/6/2011 9:10 PM, Jean wrote:
I just got a new bike and it came with Mavic CXP22 rims - the rims with
the
wear indicator groove on the rim's wall. I've noticed that the brakes
(Tektro) on this bike don't stop anywhere near as well as the Shimano
105
brakes did on some old crappy Alex rims that were on my old bike. Is
the
presence of the groove on the CXP22's probably contributing to this
poor
braking?


I have those rims and don't notice any problems braking. I have Shimano
105 brakes
though.


Do you notice a lot of brake pad debris on the bike from the groove
cutting/shredding the pads?

Not so far. I have about 5000 km on the bike. I've replaced the pads
once at the beginning of this season. Probably didn't need to but was
doing a tune up anyway. So I don't see any excessive wear either. What
kind of pads do you use?

The pads are the stock pads - whatever the Tektro brakes came with. Do you
have any recommendations for replacements?