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Suitability for Thorn catalyst (Rohloff)
jimmer
post Apr 28 2008, 06:40 PM
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HI, I'm looking to upgrade from LX Vs to the H33s. I ride a 14 month old Thorn Catalyst (853 / 725) with an Odur fork. I assume the FIRM-TEC H33 will fit on the front. I'm a bit concerned about the rear though. Is the H33 compatable with the Rohloff cable stop bolt? Hope so... Also, I will need to fit the boosters as the frame buckles even with the LXs but will it get in the way of the rear rack?

Cheers, James
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vinay
post Apr 28 2008, 08:14 PM
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Hi James,

help me a bit, what is this Rohloff cable stop bolt and what do you plan to do with it? Do you run a Rohloff rearhub and is there some bolt which could be in the way? I know quite some serious trekking bike manufacturers which use Rohloff hubs in combination with the HS33 brake on their high end trekking bikes, without any problems I know of. It might be different in your case, but that really depends on the frame then.

Same story for the rack. I've seen the rear rack in combination with the HS33 brake quite often. It probably fits in your case as well. Though you might like to let your dealer take a look at it to be sure. Mind you that even though you could leave the brakebooster out, you still have the mounting plate and there is no way to leave that one out.

All in all, best is to bring your bike to your dealer and discuss your options. That's most safe.

Cheers,
Vinay
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jimmer
post Apr 28 2008, 10:33 PM
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Hi Vinay,

Thanks for your response. I have an internally indexed Rohloff hub. The cable guide is bolted onto the rear of the left hand brake arm using an extended bolt that screws into the brake boss also securing the brake arm. The gear cable outers fit into cable stop barrel adjusters that screw through the cable guide. I'm just concerned that the diameter of the cable guide may be too great to be accomodated by the surface onto which the caliper retaining bolt screws. This links to the cable guide:

http://www.sjscycles.co.uk/product-Rohloff...-8259-11742.htm

the guide diameter is 12mm.

Given that my LBS have just ruined my road frame and they're not Magura specialists, I'll buy from Chain Reaction Cycles and self fit.

Cheers, James
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paul0303
post Jun 1 2009, 02:28 AM
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Hi, I wondered if there was an answer given on this as I am in the same situation of looking to upgrade LX brakes to HS33 but have a Rohloff cable guide bolted into the cantilever boss holding a Shimano LX?

Thx Paul




QUOTE (jimmer @ Apr 29 2008, 07:33 AM) *
Hi Vinay,

Thanks for your response. I have an internally indexed Rohloff hub. The cable guide is bolted onto the rear of the left hand brake arm using an extended bolt that screws into the brake boss also securing the brake arm. The gear cable outers fit into cable stop barrel adjusters that screw through the cable guide. I'm just concerned that the diameter of the cable guide may be too great to be accomodated by the surface onto which the caliper retaining bolt screws. This links to the cable guide:

http://www.sjscycles.co.uk/product-Rohloff...-8259-11742.htm

the guide diameter is 12mm.

Given that my LBS have just ruined my road frame and they're not Magura specialists, I'll buy from Chain Reaction Cycles and self fit.

Cheers, James

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Götz Braun@magur...
post Jun 1 2009, 09:15 AM
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Hi Paul an Jimmer,

it would be good if you could upload a picture from your actual combo in a mounted version on the bike. To fit the MAGURA HS 33 you need the canti bosses, if I got you right (Jesus, I've been now for 19 years in the bike biz, but sometimes even me lose orientation in the jungle of bits, bolts and adaptors...) the mentioned part is bolted on the canti stud once the actual V-brake is mounted, right?

If it works with the V-brake it should also work with the HS 33, however I cannot give you a guarantuee for that.

Good luck for the wrenching...


--------------------
Yours in cycling

Martin Schäfer
Head of marketing
@MAGURA Germany
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paul0303
post Jun 1 2009, 12:19 PM
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Hi, Thanks for that, yes the cable guide mounts on the canti stud once the V brake is mounted.

Cheers
Paul
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paul0303
post Jun 13 2009, 04:18 AM
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here the pictures

Paul
Attached File(s)
Attached File  P1010956.jpg ( 38.71K ) Number of downloads: 18
Attached File  P1010960.jpg ( 33.34K ) Number of downloads: 12
Attached File  P1010961.jpg ( 33.35K ) Number of downloads: 13
 
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matthews2398
post Aug 12 2009, 09:29 PM
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QUOTE (paul0303 @ Jun 13 2009, 04:18 AM) *
here the pictures

Paul

Hello I run a Thorn Raven Tour fitted with the Rohloff hub and retro fitted with HS33. Bit time consuming to fit but very straight forward really and pulling a trailer heavily laden with camping stuff and panniers which are well packed, the rim brakes do a very good job stopping you.

Well worth the effort
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