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-   -   caliper change /upgrade (https://www.bikeforums.net/bicycle-mechanics/1138080-caliper-change-upgrade.html)

CMBravo 03-12-18 08:27 AM

caliper change /upgrade
 
I could use some guidance. I been riding for about a yr. 2016 FUJI Altamira one.3 .It is primarily a 105 STI group except
for crankset ,wheels and rim brakes.They are Oval concepts 520(BB86 press fit),Vera Corsa DPM27 wheels and TEKTRO dual pivot alloy calipers.
,After 2000 miles in last 13 months ,I upgraded wheels to HED Jet + 40/60, Now ,the calipers feel a tight. they barely fit. Don't feel confident. My mechanic suggested I go o a Ultegra upgrade? the older models? but which one Is Asked .
Relax he said, your ok as is.set the TEKTRO for now. will look for used ones for you. I know he means well and experienced,but am the one riding.Yesterday before going out I checked and had to adjust for space. on rar tire.rubbing .
Please forgive my long post.
should I just buy the new 105 calipers? or go with Ultegra 6800?will they fit.
What about a new TEKTRO set with better reach?I was also told to look at SRAM and FSA
Any helpful comments or suggestions will be appreciated.

Davet 03-12-18 08:52 AM

You can find used 6800 calipers at good prices. Very good brakes, particularly when Kool Stop salmon pads are used.

6800 calipers are a direct replacement for your Tektro calipers.

SkyDog75 03-12-18 10:08 AM

I'm not going to try to talk you out of upgrading your brakes, but for whatever it's worth...

Pretty much any brake caliper, including every dual-pivot Tektro model I've had my hands on, will open PLENTY wide for any rim you could possibly fit on that bike. It should just be a matter of adjustment - namely letting out a bit of cable at the caliper's pinch bolt. And with decent pads, your Tektro brake calipers offer performance that's plenty good. (Tektro's OEM brake pads leave something to be desired, though.)

And just to clarify something... You mentioned reach, but so long as your old wheels and new ones are both 700c (and they almost certainly are), then your original brakes have the proper reach. Reach is the distance from the brake caliper's mounting bolt to the rim's brake track. It has practically nothing to do with the width of your rim.

HillRider 03-12-18 10:09 AM

Wait as minute, you only changed the wheels so the reach and power of the brakes should not have changed. If they are "tight" on the new rims, just loosen the cable anchor bolt and give the cable a bit more slack to let the arms open wider. If the brakes were satisfactory before they should still be. Perhaps better pads (KoolStop Salmons as noted above) will help too.

If your new rims and tires are wider than the old ones, you might have fork and/or frame clearance problems completely unrelated to the brakes.

CMBravo 03-19-18 06:45 AM

caliper upgrades
 

Originally Posted by Davet (Post 20218071)
You can find used 6800 calipers at good prices. Very good brakes, particularly when Kool Stop salmon pads are used.

6800 calipers are a direct replacement for your Tektro calipers.

Thanks for the feedback. I bought a set of 6800 calipers. prob change the pads.

Skydog and HillRider,I appreciate your thoughts.I had the spread checked by a mechanic. (am not to handy or knowledgeable enough to judge) ,suggested I go ahead and change. For what I could appreciate in the adjustment, cable was let out,particularly in back to allow for spread to max.but to tight. found myself physically juggling the caliper to allow the wheel rotation without contact. clearance prob ?thing one of you suggested ,could be the prob.
will try the 6800 and see what happens.
thanks again.

SkyDog75 03-19-18 09:27 AM

While I'm still confident your old brakes would've worked, here's hoping you get everything sorted out and that you're happy with your new brakes!


Originally Posted by CMBravo (Post 20231922)
...found myself physically juggling the caliper to allow the wheel rotation without contact. clearance prob ?thing one of you suggested ,could be the prob.

If a brake pad was only contacting the rim sporadically, it could be that the wheel is out of true. A mechanic could straighten out the rim in short order using a spoke wrench. If a brake pad was rubbing all the way 'round the wheel, it could be that the wheel wasn't inserted straight or fully, or it could be that the brake caliper needed to be centered.


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