Brake Pad Touching Tyre

[boydj]

Cheers good points there I've seen a video of someone file out a couple of millimetres from the bottom of the bracket they sit , any thoughts on that ?

I had to do that. It's a fairly simple solution if you only need a couple of mm.

 

[screenman]

No 49 is the max the R650 or Tiagra do a 57mm caliper

The 105 r7000 is 51mm according to Ribble

 

[screenman]

This may be bollocks but when I upgraded the whole thing I also upgraded the tyres to 28s from 25s ....is that significant

It will not change your rim size though I can see that it may get in the way of the blocks as they come in.

 

[Jimmy Welch]

Here's the final picture does everyone think that an acceptable position for the pad

 

[bikingdad90]

Your Tektro brakes that are long drop are these ones?
https://www.sjscycles.co.uk/brakes/...per-brake-5573-mm-very-deep-drop-nut-fitting/

 

[HLaB]

Here's the final picture does everyone think that an acceptable position for the pad

Still looks high to me and remember things will change as pads wear.

 

[Jimmy Welch]

Your Tektro brakes that are long drop are these ones?
https://www.sjscycles.co.uk/brakes/...per-brake-5573-mm-very-deep-drop-nut-fitting/

45 quid for the pair and they don't look a hell of a lot different from the 105s ...cheers

 

[Jimmy Welch]

Still looks high to me and remember things will change as pads wear.

For the better or worse ?

 

[bikingdad90]

45 quid for the pair and they don't look a hell of a lot different from the 105s ...cheers

Just realised the fitting might not right though, these are the same but the other fitting type https://www.sjscycles.co.uk/brakes/black-tektro-r539-long-drop-caliper-brake-set/

 

[HLaB]

For the better or worse ?

Likely for the worse. The arms will swing in that bit further and the holder will be a little higher as a result.

I has just sprung to mind I had a Tektro front break on the kinesis 9 years back but tried to swap them out for donated Ultegra breaks as the Tektro ones were sometimes to inconsistent but ran into similar problems to you. I think I got them to work for a bit before they p'tured the side wall. I searched around and got the Ultegra equivalent long reach breaks and it was OK after that and breaking was reliable.

 

[HLaB]

These ones BR650s https://bike.shimano.com/en-EU/product/component/105-5800/BR-R650.html

 

[Ajax Bay]

So this is pretty much the same scenario that both I and @Ajax Bay found ourselves in (see my thread linked above) Very pretty new blingy 105 brakes which look great but have just the teeny tiny drawback of causing your tyres to blow out.
We both fixed the problem by putting the old brakes

OP - have a read please
https://www.cyclechat.net/threads/a-cautionary-tale.291500/#post-6962868

 

[Jimmy Welch]

These ones BR650s https://bike.shimano.com/en-EU/product/component/105-5800/BR-R650.html

Cheers ill have look

 

[Yellow Saddle]

Here's the final picture does everyone think that an acceptable position for the pad

Yes, perfect.

 

[Dogtrousers]

These ones BR650s https://bike.shimano.com/en-EU/product/component/105-5800/BR-R650.html

Thanks for this. I never knew that these existed.

This has sent me off down a bit of a "brake reach" rabbit hole.
Standard 105 has a reach of 51mm and the long reach ones have 57mm.
For comparison Tektro R326 are 39-54. Tektro long drop R539 are 47-59mm. I have Tektro long reach brakes on my old Dawes but this is because I'm running modern 622mm rims on it and the bike was made for olde fangled 1980s wheels.

Sheldon also has a bit of a section on this. https://www.sheldonbrown.com/calipers.html#reach

Edit: And there's another article on the subject here: https://www.bicycling.com/bikes-gear/a20008036/an-ode-to-long-reach-brakes/

Edit edit. And another. More focused on retro bikes: https://www.pedalpedlar.co.uk/blogs/thejournal/how-to-get-the-right-brakes-for-your-vintage-bike

So it would seem that as short reach brakes go, 105s are particularly short

I might have a go at measuring the actual drop from brake nut centre to rim centre (I guess that's the metric) on my bike to see what it is. All purely theoretical as I don't plan changing my calipers again. I learned my lesson last time - if it ain't broke...