No braking power

[MURDERF4CE]

105 SLR single pivot side pull calipers with Dia Compe 135 levers. https://www.sjscycles.co.uk/brake-levers/diacompe-dc135-road-brake-levers-222mm-clamp-silver/?geoc=US

It will stop, but will not skid stop if pulled hard.

I do have some black 105 5800 dual pivot calipers in the parts bin that I can use if need be.. but would rather use the chrome calipers because they match the bike better.

[rowebr]

Starting with the 105-5700 and Ultegra-6700 series, the braking uses more cable pull than previous versions. I use the 105-5800 and they are excellent brakes, paired with the matching levers. What series are your 105 calipers?

[MURDERF4CE]

These.. not exactly sure what number they are

http://3.bp.blogspot.com/-_G68HkTw2iw/UlmdRk5Q0GI/AAAAAAAAAaw/vcUUBsvxUfo/s1600/$T2eC16Z,!y0E9s2S8i8OBR5+ggLtS!~~60_12.JPG

[pbarry]

Upgrade the pads first.

[MURDERF4CE]

Upgrade the pads first.

Thing is.. with the matching SLR hooded levers, it could skid the rear tire. These levers are supposed to be compatible, but the stopping power isn't there anymore

[rccardr]

Very familiar with those Shimano 1050/1051 series single pull calipers. They're very good for singles. But the pads are now over 30 years old and too hard to provide sufficient stopping power. Suggest you buy a set of modern holders and two pairs of Kool Stop pads to fit them. Install, adjust toe, and step one is done.

Step two is using the correct levers. I see you've gone flat bar, but those DC's are not a good match. You need levers that are supposed to match up with sidepull calipers. Tektro makes a bunch of them.

[MURDERF4CE]

I took 1051 levers off because I'm going from drop bar to an upright bar... because back problems. I was told these levers (DC135) would work.

[MURDERF4CE]

Step two is using the correct levers. I see you've gone flat bar, but those DC's are not a good match. You need levers that are supposed to match up with sidepull calipers. Tektro makes a bunch of them.

They're listed for caliper/canti brakes

Description
Designed for caliper & cantilever brakes, Stainless steel construction, 22.2mm (7/8") clamp, Classic touring lever shape, 120g pair

[pbarry]

Sorry, poor reading comprehension on my part. Those levers look like they should work. But, no matter what the copy says, if they don't stop well, there are better options. Cables new and stretched then readjusted? Not too much extra housing length?

[Tony T]

As said, try new pads.

[ultraman6970]

U want those calipers to lock the wheel???

[MURDERF4CE]

They should at least be able to

[likebikes]

totally normal for single pivot calipers

[DeBike]

I have the same calipers and had braking problems. Simply changed pads to Kool Stop salmon and now they work great.

[Peter P.]

I was told these levers (DC135) would work.

It's obvious they don't.

I never had a stopping problem with single pivot calipers, even with old brake pads.

Perhaps Avid Speed Dial 7 (https://www.sram.com/en/sram/models/bl-sd-7-a1) brake levers would work better, as they have adjustable modulation which you might be able to tune to the calipers.

[ultraman6970]

Those calipers are pretty good from from there to lock the rear wheel over pavement for a rider of 200+ pounds going down hill at 45 mph. I never seen that.


They should at least be able to