Schlumpf Speed Drive

Tosspot said:

Anyone used one of these?

Briefly, on a test bike. The Brompton will probably have one (or a
mountain drive with a different chainwheel setup) at one point, when
I've the money spare. They seem to do what they say on the tin.

Pete.
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Tel 44 1382 660111 ext. 33637 Univ. of Dundee, Ninewells Hospital
Fax 44 1382 640177 Dundee DD1 9SY Scotland UK
net [email hidden] http://www.dundee.ac.uk/~pjclinch/

Tosspot said:

Anyone used one of these?

There was one on the Trice Micro I tested for BROL a couple of years back.
Works as advertised, though does mean an increased Q-factor. Since it
effectively added only four ratios at the top end, I found myself rarely
switching into overdrive.

--
Dave Larrington - <http://www.legslarry.beerdrinkers.co.uk/>
und keine Eie.

Got one (mountain drive) on my brompton. Very well made and does it's job
perfectly.
Use Kenitics' gear calculation chart
http://www.kinetics.org.uk/html/k_gear.shtml to work out the gear ratios as
it has all the Schlumpf drives in the calculations so all you have to do is
click the box-----very useful.
What are you going to fit it to? and what do you want to acheive?
I would only suggest it's a viable purchase where no other gearing
alternative is suitable, mainly because of it's cost which is somewhere
about the 300 pound mark.
But there is no doubt thet it's a beautiful bit of engineering.

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Quoted message said:

Anyone used one of these?

Steve W said:

I would only suggest it's a viable purchase where no other gearing
alternative is suitable, mainly because of it's cost which is somewhere
about the 300 pound mark.
But there is no doubt thet it's a beautiful bit of engineering.

There's one going on ebay right now, a Mountain Drive. Auction ends in
14 hours and the price is currently at £54.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7153402225

I don''t know the seller from Adam, so, usual ebay caveats apply.

"Bob"

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Email address is spam trapped.
To reply directly remove the beverage.

Steve W said:

Got one (mountain drive) on my brompton. Very well made and does
it's job perfectly. Use Kenitics' gear calculation chart
http://www.kinetics.org.uk/html/k_gear.shtml to work out the gear
ratios as it has all the Schlumpf drives in the calculations so all
you have to do is click the box-----very useful. What are you going
to fit it to? and what do you want to acheive? I would only suggest
it's a viable purchase where no other gearing alternative is
suitable, mainly because of it's cost which is somewhere about the
300 pound mark. But there is no doubt thet it's a beautiful bit of
engineering.

Going to stick in on the Anthrotech(http://www.anthrotech.de). Its a
bit under geared and I'm
loath to move the low end up, its allready a bugger on hills. Rohloff hub.

I've mailed Schlumpf to ask if they would contact Anthrotech to see if
there are any problems and to cost up getting a second bottom bracket
housing, milling, assembling and sending it to me. The milling bit was
a concern.

Would probably be better to get a bigger chain ring just to try out
before going further, however, a very positive response from those that
use one, so allthough 300 squids is a lot, it won't be wasted.