Upgrading Brake Calipers

Would appreciate some advice.
I have an old SKS Cycles bike with Tektro brakes. I suspect they are the original calipers. They do however have newish pads on. The stopping power isn't brilliant and I'm wondering whether to upgrade to Shimano 105/Ultegra calipers. Several questions.
1. Is it likely to be the Tektro calipers that are responsible for the poor stopping power?
2. If so, can I switch the Tektro calipers for 5800 105 calipers or Ultegra 6700/6800 calipers?
3. If so, the price difference per caliper between the 2 is about £12 so is it worth getting the Ultegra ones?
Many thanks
I have an old SKS Cycles bike with Tektro brakes. I suspect they are the original calipers. They do however have newish pads on. The stopping power isn't brilliant and I'm wondering whether to upgrade to Shimano 105/Ultegra calipers. Several questions.
1. Is it likely to be the Tektro calipers that are responsible for the poor stopping power?
2. If so, can I switch the Tektro calipers for 5800 105 calipers or Ultegra 6700/6800 calipers?
3. If so, the price difference per caliper between the 2 is about £12 so is it worth getting the Ultegra ones?
Many thanks
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Posts
2. Make sure the new calipers have the same drop measurement as your current ones. The 5800,6800 wont fit your bike if it requires long drop calipers.
3. Buy 5800 or 6800 calipers. They are both as powerful. Theres little difference between them. Here's a good comparison
http://handsonbike.blogspot.co.uk/2015/ ... 0-and.html
Skip 6700, they are no way near as good.
Ideally the calipers should be matched to the correct brand levers with matching cable pull. If you are using old different brand levers they will not perform as optimally as they should. Modulation and power is going to be effected. But some playing around with the adjustment screw on the side. The 5800,6800 calipers have a good range of adjustment so will help find a happy medium. But either way they going to stop you better than any Tektro's. Even with mismatched levers.
Having looked at my calipers I don't think I'm going to be able to get the 105 5800's so perhaps the Swisstop pads are the way to go.
Thanks again.
Difficult to answer this without having some kind of reference. Poor compared to what? If you've just climbed off a disc-braked MTB and jumped on a Tektro/caliper bike, then yes, performance will feel poor in comparison. However, as far as calipers go, there's no particular reason why those particular brakes should not work effectively as calipers.
These:
http://www.wiggle.co.uk/swissstop-flash ... rake-pads/
They look expensive but are for a full set.
http://www.wiggle.co.uk/swissstop-flash ... 60661136uk
https://www.google.co.uk/search?q=Swiss ... VAQgjYIiwQ
https://www.google.co.uk/search?q=Swiss ... VAQgTYIqAQ
http://www.wiggle.co.uk/sram-apex-black ... 60493162uk