Alternative to the Schlumf Mountain Drive?

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rifraf
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Location: Two Rocks, WA

Alternative to the Schlumf Mountain Drive?

Postby rifraf » Tue Feb 14, 2012 11:04 am

The new FSA Patterson front shift crankset that gives
a 1.6 multiplication using planetary gears.
http://pattersonbike.com/products/
Surly Ogre, Carry Freedom Y-frame Trailer, Extrawheel trailer.

Baalzamon
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Location: Yangebup

Re: Alternative to the Schlumf Mountain Drive?

Postby Baalzamon » Tue Feb 14, 2012 11:49 am

And a damn sight cheaper as well. I was considering a Schlumpf drive for my Thorn, but after looking at gearing I found I would only get 4 new gears (AT) $200 each. No way was I prepared to shell out for that especially since the new gears were the higher gears. But the 28t chainring does undercut rohloff specs nicely as well so not an option either for me.
Masi Speciale CX 2008 - Brooks B17 special saddle, Garmin Edge 810
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rifraf
Posts: 3536
Joined: Fri Apr 15, 2011 5:55 pm
Location: Two Rocks, WA

Re: Alternative to the Schlumf Mountain Drive?

Postby rifraf » Tue Feb 14, 2012 12:00 pm

Baalzamon wrote:And a damn sight cheaper as well. I was considering a Schlumpf drive for my Thorn, but after looking at gearing I found I would only get 4 new gears (AT) $200 each. No way was I prepared to shell out for that especially since the new gears were the higher gears. But the 28t chainring does undercut rohloff specs nicely as well so not an option either for me.


A rider from another forum recently wrote to ask about different chain ring options
Response:

"It may be a while before the factory in Taiwan tools up larger CRs, but I may
be able to get some made locally if I can consolidate requests.

What size(s) do you think would be best?

I can't promise when they might be available, but I am working on it.

I designed the spline / snapring mounting system to allow easy removal and
replacement of various CRs.

Thankyou very much for your interest!!!"

Reply:

"I told him a 39 or 40 tooth would likely work ."
Surly Ogre, Carry Freedom Y-frame Trailer, Extrawheel trailer.

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rifraf
Posts: 3536
Joined: Fri Apr 15, 2011 5:55 pm
Location: Two Rocks, WA

Re: Alternative to the Schlumf Mountain Drive?

Postby rifraf » Fri Feb 17, 2012 1:33 pm

Someone pointed out an interesting (IMHO) review of the Patterson Transmission :D
http://www.bicycletimesmag.com/content/ ... ansmission

Theres some great pics!
Surly Ogre, Carry Freedom Y-frame Trailer, Extrawheel trailer.

icicic
Posts: 50
Joined: Tue May 22, 2007 1:10 pm

Re: Alternative to the Schlumf Mountain Drive?

Postby icicic » Fri Jun 22, 2018 10:14 am

Baalzamon wrote:And a damn sight cheaper as well. I was considering a Schlumpf drive for my Thorn, but after looking at gearing I found I would only get 4 new gears (AT) $200 each. No way was I prepared to shell out for that especially since the new gears were the higher gears. But the 28t chainring does undercut rohloff specs nicely as well so not an option either for me.



Hey Baalzamon,
I've also been thinking about pairing a Schlumpf Drive with my Rohloff, on a heavy duty cargo bike. Thanks for this info. What do you mean though re undercutting "rohloff specs"

Cheers,
Rik

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