Shimano CX75 mechanical discs. Worth it?

Original offroad cycling

Shimano CX75 mechanical discs. Worth it?

Postby Mezzo90-cyclist » Thu Apr 03, 2014 8:55 pm

Just wanting some opinions from CX racers who have experience with the Shimano BR-CX75, mechanical disc brake.

I've always been firm believer in hydro discs and well tuned canti's, but I have a choice of a Shorty 4 equipped bike or a BR-CX75 with 11-28 105 groupset.

Are the days of mechanical discs being below average past? I'll be using this bike for CX racing and probably *some* commuting.

Any opinions welcome!!!
Mezzo90-cyclist
 
Posts: 72
Joined: Wed Oct 30, 2013 12:40 pm
Location: S.E Melbourne, VIC.

by BNA » Thu Apr 03, 2014 9:05 pm

BNA
 

Re: Shimano CX75 mechanical discs. Worth it?

Postby mitchy_ » Thu Apr 03, 2014 9:05 pm

I can't comment on shimano's offerings, but my BB7 S Road's on my disc CX do a pretty decent job compared to my previous use of hydraulic discs.
Designs by Mitch - drafting specialist.
User avatar
mitchy_
 
Posts: 774
Joined: Sun Jan 05, 2014 10:15 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby Mezzo90-cyclist » Thu Apr 03, 2014 10:11 pm

I have Elixr hydro's on my 29er and find they pull up well albeit a bit noisy.

I think that even tho the pro CX riders still use and win with linear brakes, I want one bike for long term CX use and I think discs would probably remain " useable " for longer in the conditions that CX races are held in...

The main reason I'm thinking discs over canti/linear pull is that the forks / frame will have disc mounts, so I'll be able to upgrade to hydro, not that I'd particularly want to..
Mezzo90-cyclist
 
Posts: 72
Joined: Wed Oct 30, 2013 12:40 pm
Location: S.E Melbourne, VIC.

Re: Shimano CX75 mechanical discs. Worth it?

Postby Calvin27 » Thu Apr 03, 2014 10:44 pm

Never tried a CX75 but the BB7s work great albeit very noise prone.

I'd say best cable pull brakes at the moment would be TRP Spyre -under $100 each at merlin! BTW they are hydro brakes but cable actuated.
Specialized Secteur Expert
Kona Hei Hei DL
Third bike - Monstercross!
Calvin27
 
Posts: 529
Joined: Sat Feb 09, 2013 4:45 pm

Re: Shimano CX75 mechanical discs. Worth it?

Postby Mezzo90-cyclist » Fri Apr 04, 2014 11:37 am

Sounds awesome.

Well basically I have the choice of two CX bikes, a cost effective used option with the shorty 4 linear's or a new bike with 105 and cable discs

After all, it will only be a bike that will see lots of mud anyway!!
Mezzo90-cyclist
 
Posts: 72
Joined: Wed Oct 30, 2013 12:40 pm
Location: S.E Melbourne, VIC.

Re: Shimano CX75 mechanical discs. Worth it?

Postby mitchy_ » Fri Apr 04, 2014 11:43 am

Calvin27 wrote:Never tried a CX75 but the BB7s work great albeit very noise prone.

I'd say best cable pull brakes at the moment would be TRP Spyre -under $100 each at merlin! BTW they are hydro brakes but cable actuated.


you might be confused with the HY/RD's? they have a cable actuated hydraulic reservoir at the caliper end. Spyre are straight mechanical.
Designs by Mitch - drafting specialist.
User avatar
mitchy_
 
Posts: 774
Joined: Sun Jan 05, 2014 10:15 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby queequeg » Fri Apr 04, 2014 11:50 am

I run BB7 Road on my CX bike. They squeal if you use organic pads. Use sintered pads and they should be squeal free.
'11 Lynskey Cooper CX, '00 Hillbrick Steel Racing (Total Rebuild '10), '09 Electra Townie Original 21D
User avatar
queequeg
 
Posts: 3055
Joined: Thu Dec 17, 2009 9:09 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby Mezzo90-cyclist » Fri Apr 04, 2014 12:08 pm

queequeg wrote:I run BB7 Road on my CX bike. They squeal if you use organic pads. Use sintered pads and they should be squeal free.


what levers do you use mate?
Mezzo90-cyclist
 
Posts: 72
Joined: Wed Oct 30, 2013 12:40 pm
Location: S.E Melbourne, VIC.

Re: Shimano CX75 mechanical discs. Worth it?

Postby mitchy_ » Fri Apr 04, 2014 12:11 pm

queequeg wrote:I run BB7 Road on my CX bike. They squeal if you use organic pads. Use sintered pads and they should be squeal free.


damnit, just bought some organic pads to try on my BB7's. (no squeel, just wanted to see how they went)
Designs by Mitch - drafting specialist.
User avatar
mitchy_
 
Posts: 774
Joined: Sun Jan 05, 2014 10:15 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby queequeg » Fri Apr 04, 2014 12:43 pm

Mezzo90-cyclist wrote:
queequeg wrote:I run BB7 Road on my CX bike. They squeal if you use organic pads. Use sintered pads and they should be squeal free.


what levers do you use mate?


SRAM Apex
'11 Lynskey Cooper CX, '00 Hillbrick Steel Racing (Total Rebuild '10), '09 Electra Townie Original 21D
User avatar
queequeg
 
Posts: 3055
Joined: Thu Dec 17, 2009 9:09 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby queequeg » Fri Apr 04, 2014 12:46 pm

mitchy_ wrote:
queequeg wrote:I run BB7 Road on my CX bike. They squeal if you use organic pads. Use sintered pads and they should be squeal free.


damnit, just bought some organic pads to try on my BB7's. (no squeel, just wanted to see how they went)


The organic pads are softer and wear quicker. I have organic pads on my rear wheel as I had one pair left. my rear brakes squeal like a stuck pig, my front are silent!
'11 Lynskey Cooper CX, '00 Hillbrick Steel Racing (Total Rebuild '10), '09 Electra Townie Original 21D
User avatar
queequeg
 
Posts: 3055
Joined: Thu Dec 17, 2009 9:09 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby mitchy_ » Fri Apr 04, 2014 12:52 pm

queequeg wrote:
mitchy_ wrote:
queequeg wrote:I run BB7 Road on my CX bike. They squeal if you use organic pads. Use sintered pads and they should be squeal free.


damnit, just bought some organic pads to try on my BB7's. (no squeel, just wanted to see how they went)


The organic pads are softer and wear quicker. I have organic pads on my rear wheel as I had one pair left. my rear brakes squeal like a stuck pig, my front are silent!


ah, wasn't too worried about the wear but i was hoping to get a bit more power out of the organics, having come from hydraulic discs i'm used to a ridiculous amount of power... will give them a crack anyway, they aren't expensive.
Designs by Mitch - drafting specialist.
User avatar
mitchy_
 
Posts: 774
Joined: Sun Jan 05, 2014 10:15 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby Calvin27 » Fri Apr 04, 2014 1:16 pm

mitchy_ wrote:
Calvin27 wrote:Never tried a CX75 but the BB7s work great albeit very noise prone.

I'd say best cable pull brakes at the moment would be TRP Spyre -under $100 each at merlin! BTW they are hydro brakes but cable actuated.


you might be confused with the HY/RD's? they have a cable actuated hydraulic reservoir at the caliper end. Spyre are straight mechanical.


Yep, my bad got confused with a recent purchase. Spyres are full mec but they do have actuation on both sides as opposed to BB7s which only do one side (outboard).
Specialized Secteur Expert
Kona Hei Hei DL
Third bike - Monstercross!
Calvin27
 
Posts: 529
Joined: Sat Feb 09, 2013 4:45 pm

Re: Shimano CX75 mechanical discs. Worth it?

Postby Mezzo90-cyclist » Fri Apr 04, 2014 1:19 pm

[/quote]
damnit, just bought some organic pads to try on my BB7's. (no squeel, just wanted to see how they went)[/quote]

[/quote]
The organic pads are softer and wear quicker. I have organic pads on my rear wheel as I had one pair left. my rear brakes squeal like a stuck pig, my front are silent![/quote]

ah, wasn't too worried about the wear but i was hoping to get a bit more power out of the organics, having come from hydraulic discs i'm used to a ridiculous amount of power... will give them a crack anyway, they aren't expensive.[/quote]

My Avid MTB brakes on my 29er do the job well but noisy as hell. WIll have to give these pads a try.

In terms of CX discs, anyone have any issues with brake feedback through the frame/forks?
Mezzo90-cyclist
 
Posts: 72
Joined: Wed Oct 30, 2013 12:40 pm
Location: S.E Melbourne, VIC.

Re: Shimano CX75 mechanical discs. Worth it?

Postby Blakeylonger » Fri Apr 04, 2014 1:47 pm

The new Spyres are good (they added individual pad adjustment post recall), look out if you have tight spoke clearance (an issue with an SP high flange dyno) as the body is quite wide.

CX77s (CX75 was recalled) are on par and have excellent fine pad adjustment

Hy/Rds are better, have wear compensation, bit bulky.

BB7Rs are worse.

The new non series shimano mech shift / hydro brake will blow them all out of the water just like the di2 ones did, but you're stuck with 11sp.
Blakeylonger
 
Posts: 323
Joined: Wed Jun 05, 2013 11:17 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby baabaa » Fri Apr 04, 2014 1:47 pm

While not cx racing, and not the CX75, this bloke is a bit of an oracle in regard to how things work in regard to bike feel and ride.
The Spyre brakes have two moving pistons instead of one, like most mech brakes have, (including Avid BB-7's), so in that respect they are unique. This brake has a much better feel at the lever, especially with STI Shimano levers, which I've used with other mech disc brakes before and they were not easy to set up and didn't feel that great. Typically the Avid BB7's tend to feel too "mushy" and lack power with the STI levers, which tend to use up a lot of their travel to develop the kind of stopping power you may need. Not so with the Spyres, and this is the main difference. You get a great modulation feel, but you also do not have to pull the lever too far to get that. Power is great. Plenty of that on tap. The bonus here is that the Spyre brakes have been incredibly quiet as well.....so far. We'll see how long that goes on for.
http://g-tedproductions.blogspot.com.au ... wbell.html

I agree re the brifters, they feel like rubbish with bb7s ( I have use both road and mtn) when compared to a separate brakes and shifters. If you really want to race cx just stick to well tuned cantis for the time being. I have had discs on a cx bike since 2007 and still like the old canti bike for cx.
User avatar
baabaa
 
Posts: 339
Joined: Sun Apr 19, 2009 8:47 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby Mezzo90-cyclist » Fri Apr 04, 2014 1:52 pm

I agree re the brifters, they feel like rubbish with bb7s ( I have use both road and mtn) when compared to a separate brakes and shifters. If you really want to race cx just stick to well tuned cantis for the time being. I have had discs on a cx bike since 2007 and still like the old canti bike for cx.[/quote]

I have always, and will always, think that a pair of well tuned canti's / linear's are better than cable discs. but this is the mentality I've had for years,when the technology was probably nothing to what it is today.

For a bike that will really only see a few months of use per year and be raced hard and get dirty, I don't intend to spend mega bucks on a CX bike, but most lower end offerings only come in mech discs, which made me think the technology can't be half bad..
Mezzo90-cyclist
 
Posts: 72
Joined: Wed Oct 30, 2013 12:40 pm
Location: S.E Melbourne, VIC.

Re: Shimano CX75 mechanical discs. Worth it?

Postby Blakeylonger » Fri Apr 04, 2014 3:21 pm

If you are capital R racing, stick with cantis and spend your money on tubulars and entry fees.

If you are in a dry climate and already have a canti boss cx bike, fit 926AL/CX8.4/RX5/minimoto mini vees and call it a day.

If you are adventuring / commuting in all weather conditions and maybe race it too, discs are a great idea.
Blakeylonger
 
Posts: 323
Joined: Wed Jun 05, 2013 11:17 am

Re: Shimano CX75 mechanical discs. Worth it?

Postby Mezzo90-cyclist » Fri Apr 04, 2014 3:37 pm

Thanks for the info. Just reinforces the facts that I was thinking.

I don't think I'd be commuting on it enough to want discs, and even if so, I'd prefer a well tuned set of Linears. If I came across a set of avid ultimates later on then I'd be happy enough to leave it at that.
Mezzo90-cyclist
 
Posts: 72
Joined: Wed Oct 30, 2013 12:40 pm
Location: S.E Melbourne, VIC.

Re: Shimano CX75 mechanical discs. Worth it?

Postby Fletch » Mon Apr 07, 2014 8:13 pm

is there anywhere spyres or the hy/rd brakes are available in OZ?

If not good internet suplier to deal with.
Fletch
 
Posts: 161
Joined: Thu May 29, 2008 12:07 pm
Location: Ocean Grove, Vic

Re: Shimano CX75 mechanical discs. Worth it?

Postby Mafra » Mon Apr 07, 2014 11:10 pm

Fletch - I bought my HY/RDs direct from trpbrakes.com last year when thy were first released.

raced on them through the Victorian CX season last year, the issue with my performance can be traced to the engine, not the brakes.
Great for singletrack, commutting and racing.

Looks like Merlin has them in stock as an alternative.
Mafra
 
Posts: 3
Joined: Sun Jan 19, 2014 8:47 pm

Re: Shimano CX75 mechanical discs. Worth it?

Postby fletch62 » Wed Apr 09, 2014 8:02 pm

Jenson USA have them in stock.
fletch62
 
Posts: 350
Joined: Sun Feb 10, 2008 10:39 am
Location: Geelong

Re: Shimano CX75 mechanical discs. Worth it?

Postby Bentnose » Sun May 18, 2014 8:15 am

Probably a bit late but I've been running the CX75 (and the replacement to the recalled units) for the last 15 months. They work well but a lot of lever travel occurs often and I seem to have to wind the pads in more often than I'd expect to maintain a firm lever. I personally think they would be useless for CX racing as pad wear with cable discs is an issue when they don't self adjust, a barrel adjuster would be good if it moved both pads but it doesn't. I've just given up on cable discs on my MTB for the same reason, after 5 years. I did find it easier to stuff the setup of the these brakes up than BB7's were I had the moving part of the calipher moving too far and hitting the stop so I had some brake but not that much, I was a bit lazy and rode for a whole week like this. This issomething I've never done with BB7's, though now I am aware of it then it won't happen again. Also to adjust the pads on CX75's you need 2 different size allen keys which makes it fiddly on the the fly. Don't get me wrong they are good brakes, I just think that hydraulic brakes are better.
Last time I checked, 2014 Distance: 5006km Time: 213hr Rides: 193
User avatar
Bentnose
 
Posts: 749
Joined: Sun Jan 03, 2010 8:00 am
Location: Watsonia North, Victoria


Return to Cyclocross

Who is online

Users browsing this forum: No registered users



Popular Bike Shops
Wiggle Wiggle UK
Ground Effect Ground Effect NZ
Ebay Ebay AU
Chain Reaction Cycles CRC UK

“Bicycles BNA Twitter
“Bicycles BNA Facebook
“Google+ BNA Google+
“Bicycles BNA Newsletter

> FREE BNA Stickers