Woosh CD Sport Disc Brakes

[John F]

Hi JohnF, Ive ordered shimano deore m615's (for no other reason than that chainreactioncycles do front handle calliper combos for £34 and the zoom completely failing at 30mph yesterday on a steep decent at 30mph giving me the first authentic near death experience in at least five years). How are you getting on? i'm hoping the zoom rotor will be OK and that as D8ve suggests only one/rear brake cutting teh motor will do.

That is worrying! What actually failed?

Where did you get the brake from?

Let us know how the fitting goes, then I'll get one.

 

[John F]

Hi JohnF, Ive ordered shimano deore m615's (for no other reason than that chainreactioncycles do front handle calliper combos for £34 and the zoom completely failing at 30mph yesterday on a steep decent at 30mph giving me the first authentic near death experience in at least five years). How are you getting on? i'm hoping the zoom rotor will be OK and that as D8ve suggests only one/rear brake cutting teh motor will do.

If you shorten the hose on hydraulic brakes do you then need a 'bleed kit' as well? (just read this in the comments from Chain Reaction Cycles)

 

[derf]

That is worrying! What actually failed?

Where did you get the brake from?

Let us know how the fitting goes, then I'll get one.

let this be a warning to anyone using a zoom disc brake - the cable housing popped out of the slot in the calliper as I braked hard - and didn't slot back in (I felt the brakes become much firmer momentarily) - then as I braked hard again the tension in the cable pulled the cable out of the locknut - on the third pull the cable housing popped back into the calliper but with an extra cm of cable meaning it had no pull (or breaking) whatsoever - its weird - we take brakes for granted on bikes. I haven't s&*t myself that badly in years. from now on brakes are a greater priority than anything else. I am too unknowledgeable to cut hydraulic brake pipes - I think i'll just accept whatever length it is? I will say how I get on.

 

[trex]

you don't need to cut anything. The hoses are long enough.

 

[John F]

let this be a warning to anyone using a zoom disc brake - the cable housing popped out of the slot in the calliper as I braked hard - and didn't slot back in (I felt the brakes become much firmer momentarily) - then as I braked hard again the tension in the cable pulled the cable out of the locknut - on the third pull the cable housing popped back into the calliper but with an extra cm of cable meaning it had no pull (or breaking) whatsoever - its weird - we take brakes for granted on bikes. I haven't s&*t myself that badly in years. from now on brakes are a greater priority than anything else. I am too unknowledgeable to cut hydraulic brake pipes - I think i'll just accept whatever length it is? I will say how I get on.

let this be a warning to anyone using a zoom disc brake - the cable housing popped out of the slot in the calliper as I braked hard - and didn't slot back in (I felt the brakes become much firmer momentarily) - then as I braked hard again the tension in the cable pulled the cable out of the locknut - on the third pull the cable housing popped back into the calliper but with an extra cm of cable meaning it had no pull (or breaking) whatsoever - its weird - we take brakes for granted on bikes. I haven't s&*t myself that badly in years. from now on brakes are a greater priority than anything else. I am too unknowledgeable to cut hydraulic brake pipes - I think i'll just accept whatever length it is? I will say how I get on.

Just checked mine and I'm not with you on your explanation for failure. How can it 'pop' out? The cable end is seated and remains so due to the lever where the cable terminates keeping it in tension. The only issues I could anticipate would be if the cable end mounting bolt unscrewed (poor maintenance) or sheared off (definitely time to get rid), the cable broke (bad luck?/poor quality) or the locking nut not tight enough (bad maintenance)

There may be other causes of catastrophic failure, but I wouldn't condemn mechanical brakes. In fact I will be more nervous when I get my hydraulic brake. With the quality of much bike stuff that I've bought over the years leaving much to be desired (just my opinion folks!) With a mech one "what you see is what you get" Now what I do when my new hydraulic one springs a leak?......

 

[John F]

you don't need to cut anything. The hoses are long enough.

I read somewhere that they could be too long hence the question.

 

[trex]

the M615 front + right handle comes with 100cm hose fits perfectly the Santana CDL.
http://www.chainreactioncycles.com/shimano-deore-m615-disc-brake/rp-prod108802

 

[John F]

you don't need to cut anything. The hoses are long enough.

Excellent thanks

 

[derf]

you don't need to cut anything. The hoses are long enough.

many thanks, that's reassuring

 

[derf]

Just checked mine and I'm not with you on your explanation for failure. How can it 'pop' out? The cable end is seated and remains so due to the lever where the cable terminates keeping it in tension. The only issues I could anticipate would be if the cable end mounting bolt unscrewed (poor maintenance) or sheared off (definitely time to get rid), the cable broke (bad luck?/poor quality) or the locking nut not tight enough (bad maintenance)

There may be other causes of catastrophic failure, but I wouldn't condemn mechanical brakes. In fact I will be more nervous when I get my hydraulic brake. With the quality of much bike stuff that I've bought over the years leaving much to be desired (just my opinion folks!) With a mech one "what you see is what you get" Now what I do when my new hydraulic one springs a leak?......View attachment 9298

I haven't had it long enough for maintenance (about hundred miles plus) and the mounting bolt - judging by the skid mark - was pretty tight. the cable is definitely not broken. there's a few things that occurred to me - after 100 miles I've had to apply a lot of pressure to get the wheel to almost lock/brake sharply. not unusual amounts - but lots. I think this puts lots of strain on a cable system that looks - to my untrained eye - no more robust than any other cheap v-brakes' (which, again to my untrained eye, has more leverage and so perhaps is under less tension as far as cables are concerned than a mechanical disk). I'm no engineer and don't want to pretend to know exactly what happened - but that's all I can conclude from the facts (a new, displaced cable in a set screw and the tightening before the complete loss of braking in a system that worked before and hadn't been molested). i'll try to upload pics if i can next.

 

[John F]

I haven't had it long enough for maintenance (about hundred miles plus) and the mounting bolt - judging by the skid mark - was pretty tight. the cable is definitely not broken. there's a few things that occurred to me - after 100 miles I've had to apply a lot of pressure to get the wheel to almost lock/brake sharply. not unusual amounts - but lots. I think this puts lots of strain on a cable system that looks - to my untrained eye - no more robust than any other cheap v-brakes' (which, again to my untrained eye, has more leverage and so perhaps is under less tension as far as cables are concerned than a mechanical disk). I'm no engineer and don't want to pretend to know exactly what happened - but that's all I can conclude from the facts (a new, displaced cable in a set screw and the tightening before the complete loss of braking in a system that worked before and hadn't been molested). i'll try to upload pics if i can next.

Yes my rear V brake seems more powerful than the disc. The only advantage perhaps is that they are supposed to work in the wet.

When are fitting the new brake? Looking forward to hearing about it. For £34 its worth a go!

 

[John F]

Just one more question. Do I need to take into account the width of my existing rotor before changing to another make of brake?

 

[trex]

the M615 will work with your existing 160mm rotor.

 

[D C]

I just put this on the front of one of my none electric bikes and for £12.99 from woolly hat shop on ebay it's great value and stops the bike as well as my hydraulics, even with my considerable weight.

 

[John F]

Hi JohnF, Ive ordered shimano deore m615's (for no other reason than that chainreactioncycles do front handle calliper combos for £34 and the zoom completely failing at 30mph yesterday on a steep decent at 30mph giving me the first authentic near death experience in at least five years). How are you getting on? i'm hoping the zoom rotor will be OK and that as D8ve suggests only one/rear brake cutting teh motor will do.

Just ordered the same ones as you. They seem to be the business when you read the reviews

 

[derf]

Just ordered the same ones as you. They seem to be the business when you read the reviews

yes, I'm getting mine Tuesday, but I tend to get overoptimistic, so let's wait and see..

 

[the_killjoy]

Looking forward to a review when you have fitted it.

 

[derf]

I've received the shimano m615 and fitted it - I'm a complete newbie when it comes to disc brakes - never mind hydraulic. the braking power is transformed - with gentle pressure it provides complete control up to locking front wheel. however, despite my fiddling it still rubs a bit - there's some very soft grinding noise - is this normal while hydraulic discs are bedding in? altogether im enormously chuffed - it feels just like the maguras on my other half's kalkhof, if not better (so far!).

 

[derf]

I've received the shimano m615 and fitted it - I'm a complete newbie when it comes to disc brakes - never mind hydraulic. the braking power is transformed - with gentle pressure it provides complete control up to locking front wheel. however, despite my fiddling it still rubs a bit - there's some very soft grinding noise - is this normal while hydraulic discs are bedding in? altogether im enormously chuffed - it feels just like the maguras on my other half's kalkhof, if not better (so far!).

fitting by the way is a doddle - two bolts to fit calliper and a few bolts to fit handle - no bleeding or anything.

 

[trex]

can you post a picture?
The pads are auto-centering but there are limits - try to set the caliper such that the rotor is in the middle of the gap between the two pads.