Who will make me a custom rotor?

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DaveyL
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Who will make me a custom rotor?

Postby DaveyL » Thu Oct 27, 2011 08:30 am

I would like a disc rotor with a size and bolt pattern which isn't commercially available. Will any company make me a rotor, or will they all turn me down on safety grounds?

johnsav
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Postby johnsav » Thu Oct 27, 2011 08:39 am

surely asking them would be the best bet

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nicklouse
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Postby nicklouse » Thu Oct 27, 2011 08:40 am

what do you need?
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Postby cooldad » Thu Oct 27, 2011 08:41 am

What is it for - most are available somewhere, even obsolete ones.
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DaveyL
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Postby DaveyL » Thu Oct 27, 2011 08:42 am

johnsav wrote:surely asking them would be the best bet


Asking who? Just the big companies like Hope etc.? I don't know who makes custom rotors, if anyone, hence the post asking the question.

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DaveyL
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Postby DaveyL » Thu Oct 27, 2011 08:43 am

cooldad wrote:What is it for - most are available somewhere, even obsolete ones.


It's not available anywhere. Hence me asking the question.

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nicklouse
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Postby nicklouse » Thu Oct 27, 2011 08:45 am

DaveyL wrote:
cooldad wrote:What is it for - most are available somewhere, even obsolete ones.


It's not available anywhere. Hence me asking the question.


so what are you looking for?
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DaveyL
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Postby DaveyL » Thu Oct 27, 2011 08:45 am

nicklouse wrote:what do you need?


I have a PowerTap wheel with disc rotor on my 29er. I would like to use it on my CX bike. The rear hub spacing is fine at 135 mm, but the PowerTap rotor is only available in 160 mm and the frame won't accept anything bigger than 140 at the back. The PT rotor is a bespoke design because of the PT hub - it has an 8 bolt pattern. I'd like someone to make me a 140 mm equivalent.

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nicklouse
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Postby nicklouse » Thu Oct 27, 2011 10:21 am

Ok a bit more than just a disc.

a 8 bolt carrier and then a rivited disc on that.

I will be time to talk to your local engineers and see if they can point you to a water jet cutter. you may (will) have to give them the existing disc carrier for canablising and measuring.

Likewise call Hope and see if they have anything in the works.
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DaveyL
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Postby DaveyL » Thu Oct 27, 2011 11:03 am

nicklouse wrote:Ok a bit more than just a disc.

a 8 bolt carrier and then a rivited disc on that.

I will be time to talk to your local engineers and see if they can point you to a water jet cutter. you may (will) have to give them the existing disc carrier for canablising and measuring.

Likewise call Hope and see if they have anything in the works.


Not just the disc? The bit the rotor bolts onto is an integral part of the PT hub. Can't I "just" get another rotor made, 140 mm in diameter which will bolt onto the carrier?

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nicklouse
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Postby nicklouse » Thu Oct 27, 2011 11:12 am

is it bolted on? looks like it is rivited with 6 rivits.

Image

or is yours different.
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DaveyL
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Postby DaveyL » Thu Oct 27, 2011 11:19 am

I'll need to have a look - you are probably right as it I doubt the design has changed.

Might be easier to find a frame that'll take it as is...

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njee20
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Postby njee20 » Thu Oct 27, 2011 11:21 am

All the PT ones I've seen have been like that - you should be able to get an engineering place to machine a new rotor to rivet to the carrier. Whether it's cost effective is another question, but then you use a PT on an MTB so that's probably not an issue... ;-)

Have you tried a 160mm rotor in the frame?

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DaveyL
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Postby DaveyL » Thu Oct 27, 2011 11:26 am

Thanks. Yeah, tried - it doesn't fit. I know some do (e.g. the Boardman CX frames) but not this one (Spesh TriCross)

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njee20
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Postby njee20 » Thu Oct 27, 2011 11:39 am

Change it for a Crux? Far nicer bike if you're interested in performance!

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Postby thistle (MBNW) » Thu Oct 27, 2011 11:48 am

BETD might be able to do it if you can't find a local company.

If they've not done one before though the set up charge is likely to be very high and they will probably need the old rotor to get the rivet pattern.

They were pretty helpful when I rang them about frame bearings so might be worth asking, the worst they can say is no.

Hope would probably make you one, but again the costs are likely to be high if it's not an off the shelf thing.

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DaveyL
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Postby DaveyL » Thu Oct 27, 2011 11:49 am

njee20 wrote:Change it for a Crux? Far nicer bike if you're interested in performance!


Spesh customer service say the Crux is pretty much the same geometry back there and will also not take a 160. I agreee it is a nicer bike though!

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WisePranker
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Postby WisePranker » Thu Oct 27, 2011 12:18 pm

Try ABE in Greenwich. They make motorbike discs so could probably do one for you fairly easily.

http://www.allbikeengineering.co.uk/

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Ginjafro
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Postby Ginjafro » Thu Oct 27, 2011 12:34 pm

Try these two, Dirty Dog and Brake Stuff. I've seen DD advertise in UK mags before and one or two flashy MTBs on More Dirt and Pink Bike have displayed some pretty cool rotors.

http://www.dirtydogmtb.com/
http://www.brake-stuff.de/
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DaveyL
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Postby DaveyL » Thu Oct 27, 2011 15:47 pm

Thanks for these leads, guys. There might be something promising to follow from them....


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