Brake Pad Touching Tyre

[Jimmy Welch]

Hi All I've noticed my 105 pads are ever so slightly touching the rim of the tyre it's only on the front and on one side and I've lowered them as far as they'll go in the bracket

 

[bikingdad90]

Is the wheel seated correctly and not sitting on the lawyers lip?

 

[Jimmy Welch]

Is the wheel seated correctly and not sitting on the lawyers lip?

Yeah checked and re checked its right in the drops

 

[Andy in Germany]

Hi All I've noticed my 105 pads are ever so slightly touching the rim of the tyre it's only on the front and on one side and I've lowered them as far as they'll go in the bracket

All the way around or only one one point?

 

[Ajax Bay]

Be aware that riding them like that will result in abrasion of the sidewall and eventually slight tube protuberance, followed invariably on a steep downhill by an immediate deflation which on the front may have 'consequences' (and not just needing to boot and replace the tube and gingerly make it home). DAMHIKT (x2)
I bought some 105 brakes (on here I think) which looked dead smart but when I fitted them I had exactly your issue, so reinstated the originals, which had that extra few mm of reach.
Apart from replacement, the best thing you can do is use new pads as this pushes the caliper arms apart and makes a mm difference. It may be that the pads currently have minimal wear, in which case this mitigation route is null.
Vital that the pads are precisely tangential.
But as the pads wear down, beware.
The other thing you can do is to pare the top edge of the pads, narrowing them (so reducing contact area and efficiency) but at least they won't abrade the tyres.

 

[screenman]

Have they always been like this or have you changed something? brake calipers do come in different sizes to account for closer tyre clearance to the frame etc.

 

[Jimmy Welch]

Be aware that riding them like that will result in abrasion of the sidewall and eventually slight tube protuberance, followed invariably on a steep downhill by an immediate deflation which on the front may have 'consequences' (and not just needing to boot and replace the tube and gingerly make it home). DAMHIKT (x2)
I bought some 105 brakes (on here I think) which looked dead smart but when I fitted them I had exactly your issue, so reinstated the originals, which had that extra few mm of reach.
Apart from replacement, the best thing you can do is use new pads as this pushes the caliper arms apart and makes a mm difference. It may be that the pads currently have minimal wear, in which case this mitigation route is null.
Vital that the pads are precisely tangential.
But as the pads wear down, beware.
The other thing you can do is to pare the top edge of the pads, narrowing them (so reducing contact area and efficiency) but at least they won't abrade the tyres.

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 ?

 

[Jimmy Welch]

Have they always been like this or have you changed something? brake calipers do come in different sizes to account for closer tyre clearance to the frame etc.

Hi yeah I recently upgraded the whole groupset to 105 from Claris (brakes calipers were Tekro)

 

[vickster]

Are they the same drop as previous brakes?

 

[Jimmy Welch]

Are they the same drop as previous brakes?

I'm not sure , the rear are bang on and even the rhs pad on the front is in perfect position its just the lhs pad that's a mil or so out

 

[Jimmy Welch]

There's what the rear pads look like

 

[Jimmy Welch]

All the way around or only one one point?

All across the top edge

 

[screenman]

Hi yeah I recently upgraded the whole groupset to 105 from Claris (brakes calipers were Tekro)

My guess was right then, you need a longer drop front caliper.

 

[screenman]

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 ?

You could do that, not sure what it would do strength wise though, not a lot would be my guess.

 

[T4tomo]

there are 2 solutions:
- buy some longer drop calipers or put the tektro calipers back on.
- replace the hubs with some 27" rims. That gains you 4mm of clearance.