[Willdb]

Is it just me or are 105 hydro brakes not really upto much? I’m certainly not impressed with mine, especially when compared to my other bike with what I believe are the lower end sram apex hydros, which are twice as powerful, don’t ever squeal, done twice the mileage, seen all weathers and have had no maintenance at all.. By contrast my pampered 105 system has seen no bad weather, been fully bled, had new ceramic pads and ultegra rotors fitted and they still feel like cane operated single piston brakes.. I’m thinking of selling it because of this inferior characteristic..it makes me think that shimano groupsets are all marketing bluster… Any thoughts anyone?

Topic

[IanMSpencer]

Good point. I think the R785

Good point. I think the R785 was the Mk1 attempt at road bikes and they soon came up with the revised variant where they updated pad design.  Since then the road bike pads have diverged to their own variant which has remained consistent. When I did repairs, tracking pads was a nightmare and given you could see there was little functional difference, it was really annoying. Nearly as bad as gear hangers – another one with ridiculously pointless variation.

Quite a useful chart here:

https://shimanobikes-nz.prontoavenue.biz/ts1570079501/attachments/Page/20/Disc%20Brake%20Pad%20Compatibility%20Chart.pdf

[mark1a]

Although I have one road bike

Although I have one road bike with R785 calipers and takes the J type rather than L type pad. 

[IanMSpencer]

Shimano have only one fit of

Shimano have only one fit of “road” pads, so they are all interchangeable, including with GRX, though they have made several variants of that fit, their coding covers the brake material and whether they are finned, but as these codes are intermixed with their MTB and hybrid series it is quite baffling.

You don’t need to have finned just because that’s what was delivered either, and unless you regularly ride somewhere needing a lot of steep braking descents, the fins aren’t going to do anything for you. 

[Steve K]

hawkinspeter wrote:

It’s the higher end rotors (including Ultegra) that are rated for use with metallic and resin pads. The cheaper ones which presumably use softer alloys are specified for resin pads only as otherwise the rotors would wear too quickly and fail quicker than a hollow-bonded crank.

High end rotors – good

High end cranks – bad.

[hawkinspeter]

Cristox wrote:

Cristox wrote:

huntswheelers wrote:

For those rotors you need resin pads…. if you want mixed pads or different pads to Resin then get some other rotors…

This is complete nonsense. The Ultegra rotors are fine with metallic and resin pads.

It’s the higher end rotors (including Ultegra) that are rated for use with metallic and resin pads. The cheaper ones which presumably use softer alloys are specified for resin pads only as otherwise the rotors would wear too quickly and fail quicker than a hollow-bonded crank.

[Cristox]

huntswheelers wrote:

huntswheelers wrote:

For those rotors you need resin pads…. if you want mixed pads or different pads to Resin then get some other rotors…

This is complete nonsense. The Ultegra rotors are fine with metallic and resin pads.

[huntswheelers]

For those rotors you need

For those rotors you need resin pads…. if you want mixed pads or different pads to Resin then get some other rotors…. When customers come with similar issues, I pop them on Prime rotors from Wiggle and semi metallic pads.. never had any complaints… and…always Shimano disc brakes…. as for Sram… they have other issues…lol

[mark1a]

They should both be Shimano L

They should both be Shimano L type, yes. 

[Wingguy]

Any Ice-Tech rotors are fine

Any Ice-Tech rotors are fine for sintered or ceramic pads. All the resin only ones are much cheaper options.

[Willdb]

I’ll check that..my rotors

I’ll check that..my rotors are rt800 icetech… I’m ordering some resin regardless 

[Willdb]

I think you maybe right.. I

I think you maybe right.. I think if the ceramic pads are cool then the bite will be reduced.. Would you know if R8070 pads fit R7020 callipers?

[Willdb]

Discs and pads are new… I

Discs and pads are new… I think maybe the ceramic pads could be the issue?

[Jimmy Ray Will]

As other comments, my first

As other comments, my first thought is why do you have the ceramic pads? 

 

 

[Wingguy]

Those are the cheapy cheapy

Those are the cheapy cheapy rotors. Anything 6x series or above is fine for any compound (like the sintered pads that Shimano themselves make). Equivalent series rotors to 105 or Tiagra will be fine, though sometimes brands will cheap out and spec a bottom end resin only rotor as OE on an otherwise 105 spec bike.

[Willdb]

Steve K wrote:

Steve K wrote:

Which Ribble bike do you have, BTW?

It’s a carbon SL Disc 

[Author]

Replies