Karasawa Screw on Tandem Drum Brake Replaces Arai

Customer Reviews (5)
4.8 / 5| Write your review
£49.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
Fits all tandem hubs with thread on the left hand side, opposite the freewheel. Supplied with clip on fitting for chainstay including cable stop and adjuster. If fitting this to a frame with a braze on stop it may be necesay to drill a fresh hole.108mm diameter drum, 850g. This brake is intended as an additional (third) brake for a tandem, acting on the hub to keep the rims cool while descending, please note that if used for long periods of time this brake will get very hot. When hot it's function will fade, when this occurs the tandem should be stopped using the rim brakes.
Hole size for axle 14mm, supplied with a spacer to reduce the axle diameter to 10mm.
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Product Reviews (5)
Questions & Answers (10) Q & A
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Product Reviews (5)
Overall Product Rating 4.8 / 5
Good rear brake option for an older tandem
By Paul
18 Jul 2018
5 / 5
I recommend this product
ConsHeavy - but does that matter on a casual tandem?
ProsGood option for a rear brake with a left side threaded hub
Unit arrive in ~ 1 week. Fits up well to a late 90's vintage Burley Rumba tandem.

Fitted this up to enable the stoker to have some braking capability.
Perfect Replacement
By Brian
11 Jul 2017
5 / 5
I recommend this product
I could not believe it, but the Karasawa Screw on Tandem Drum Brake replaces the Arai drum brake on my Schwinn Tandem perfectly. The Arai is no longer made and replacement parts are hard to find and very expensive. I had a mechanic install it. He said there was not a tool in the box for the install, but that didn't seem to be a problem for him as he has worked on drum brakes before. Delivery to the US was not a problem and arrived quicker then I thought it would.
Arrived As Expected
By Jeffrey Gicklhorn
15 Mar 2017
5 / 5
I recommend this product
ConsA bit heavy
ProsInexpensive, Replacement for Arai
Everything arrived quickly (shipping to USA). Have not had a chance to install on our tandem yet.
Karasawa Drum Brake
By Bruce Jeffrey
08 Oct 2012
4 / 5
I recommend this product
ConsLack of fitting instructions
ProsIt does the job.
Bought this specifically for a two week trip to the Vivarais/Causse areas of France in September. It was rather fiddly to fit, lacking any clear instructions, but I got there eventually. I'd been caught out a couple of years ago with tandem/trailer and only two rim brakes which resulted in walking down most long descents. This did not please the stoker. But the Chinese brake proved invaluable and using a combination of all three brakes (2 X XTR + drum), we were able to descend slowly/safely, all the hills encountered. Admittedly didn't have a trailer this time, just four panniers. It did squeak occasionally, but what brake doesn't?
Drum Brake
By Paul Wrighton
11 Jun 2012
5 / 5
I recommend this product
ConsSlightly less pretty.
ProsReadily available.
I was nervous that being a generic Chinese product this may be inferior in some way to the renowned but obsolete Arai product. Although it appears less swich and has a chromed rather than matt black finish it seems to me to do a fine job, without any noticeable fade or other problems that I worried over.

So far maintenance free after a couple of months use on average English roads. Hopeful it should have a long life and no problem with spares or replacement parts!
Questions & Answers (10)
Can I use this with a Rohloff hub?
20 Jun 2022
No, it will not as the hub has no provision to fit this brake.

JK 20.06.22
Will it mount on a Sturmey SX-RB3 hub
20 Oct 2019
On my bike, the rear Wheel comes with a band brake which is mounted on a sturmey archer hub (SX-RB3)
Is it possible to mount that karasawa drum brake instead of my band brake (end of life)
Best regards
We are generally unable to confirm on part fitting compatibility unless we have fitted them bikes we do not produce/sell.

Thanks - 21/10/19
Can I fit this to my Dawes galaxy twin 2003 /2004 model it has a screw threads on left rear hub.
22 Jul 2018
We are generally unable to confirm on part fitting to bikes we do not produce/sell without seeing them.

Can this be screwed to a six-bolt disc hub?
29 Jun 2018
Just wondering if the two holes either side of the threaded centre of this hub will enable it to be screwed to a standard six-bolt disc hub (I can't find any info online on the spacing and diametre of these two holes).
No, this will not fit a 6 bolt disc hub.

Can I use this on a Giordano Viaggio?
17 Jun 2018
We simply could not advise as we do not know the specification of your bicycle.

Hub Compatibility
08 Jan 2017
I have a Thorn Adventure purchased in 2005 with a 48 spoke rear wheel consisting a CR18 Rim and a Shimano hub identified as FH-HF08 and is threaded on the opposite side to the freewheel. Is this hub compatible with the Karasawa hub break and where is the third brake lever normally located. Thanks

This screw on drum brake uses the same thread as your hub so should fit fine. There a few different options for the brake lever, you can mount a 3rd lever to the main set of handlebars, the stoker can have a working brake lever or there is the option of using a cable splitter to allow one brake lever to operate two brakes.

Karasawa Servo 90 Brake
20 Nov 2016
Do you have a Safety Brake for my old Karasawa Servo 90 Brake. It's for my E-GO electric bike.

This Karasawa drum brake is the only product from Karasawa we're able to get hold of I'm afraid.

Brake Activation
23 Jun 2015
I'm new to the drum brakes, and have an older Santana (1989 Visa I think), that has the threading on the rear hub. I presume this will fit, but how do you activate the brake? Do I need a lever and cable kit?

You will need to purchase a brake lever and cable to operate this brake. Drum brakes use the same cable pull as calliper and cantilever brakes so you will need a brake lever suited to one of those.

Will This Fit A Shimano Fh Hf05 Hub?
15 Apr 2015
The existing Arai is giving me trouble. Will this fit the Shimano hub?

This tandem drum brake fits to the same threads as an Arai would so this should fit your hub fine.

How Is This Installed On The Wheel?
25 Dec 2014

It screws onto a hub specifically designed to accept a drum brake.