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Old 07-23-09, 01:22 PM   #1
Azreal911
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Has any strida owners retrofitted a 2 speed on this bike?

I haven't seen anyone try this yet but has anyone attempted to modify their strida with a schlumpf 2 speed drive at the pedals?

http://schlumpf.ch/hsd_engl.htm

I was very interested in the high speed drive or speed drive with their ratio of 1:1.65 for the speed model and 1:2.5 gear ratio for their high speed model. This looks like an awesome upgrade but also very expensive! but if successful our strida can really get up to like 100+ gear inches. which would be downright scary and probably very hard to pedal so maybe the 1.65 ratio would be best for a good 92 gear inches for some good cruising speed (using the 56 gear inches that they post).

Has someone found another company that sells a cheaper version than this since it's almost the price of the bike! If not I will probably have to wait for Ming Cycles to come up with a retrofit part since their strida 6's seems to be all two speed. Hopefully it's cheaper!
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Old 07-23-09, 01:47 PM   #2
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For a while, Strida was selling a MAS Special that had the Schlumpf built it. I think it was a limited run though.

PS - Just saw, Areaware is doing the Sport Duo again this year (Schlumpf drive, but not as tricked out as the MAS Special was)
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Old 07-23-09, 02:14 PM   #3
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The wheel base on stride is very short, so going up hills with any gearing might be impossible.

If the BB and crankarms are standard then the upgrade should be possible.

If your plan is to get the bike to go faster, Strida might not be safe at the speeds you want.

2 speed might be nice but probably not too useful.
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Old 07-23-09, 03:17 PM   #4
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Strida with a Schlumpf drive! Why?
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Old 07-23-09, 05:23 PM   #5
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Why? cause it should work the best without too much modifications, also their special edition already comes with a schlumpf but quite costly also it's a pretty sturdy little folder with minimal flex. I found it pretty stable when I was maxxed it at 30km/h, the only concern would be the bottom bracket that it's mounting to cause the existing one is modified so you can correctly tension the belt.

This mod would mostly benefit from flat lands for a higher top speed mostly. uphills you'd be using it the lower 1:1 ratio gear anyways. But at a price of around 650 USD, i'd rather skip it and look for a more cost effective alternative probably another brand. Not sure if such a thing exists outside of schlumpf hopefully something under 200, just hoping
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Old 07-24-09, 04:45 AM   #6
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The 2 speed Strida was delayed due some problems with the gearing. Ming Cycles doesn't use Schlumpf because of their high price (I do not remember if the new 2 speed system is produced by Ming or another cheap manufacturer).
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Old 07-24-09, 05:02 AM   #7
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http://www.ats-speeddrive.com/

Quote:
22nd April, 2009

STRIDA HK wrote:Well, latest news from factory is that will use the ATS 2 Speed (Taiwan) instead of Schlumpf Drive (Switzerland), so cost should come down significantly.
http://www.stridaforum.com/forum/vie...Schlumpf#p3919
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Old 07-24-09, 06:44 AM   #8
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I had a look at the two-speed Strida a few days ago. It retails here in Taiwan for NT$29,800 or about US$910.
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Old 07-24-09, 08:33 AM   #9
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That's good news that there is a cheaper alternative! guess for now I'll have to wait till ming really establishes their strida 6 and the 2 speed gets into full production (not just limited edition specials) which by then we can buy just that part to replace on my 5. I saw pics of that strida 6 and its still using the same 5's frame so retrofitting isn't out of the question. It's a neat little bike and I really enjoy riding to work on it. Only thing is riding to work is more downhill so it really spins out alot and it's really fun passing full size bikes on some folding contraption that we all ride on in this sub forum.


Edit: unfortunately the only thing I don't like about that two speed strida is that the low gearing is a bit too low, the single speed 56inches they have now is perfect for the low gear. wish it kept the low gear as 56 and high gear it to 92 inches. now that's high gear! the 70 is good but the 42 inches that's on that two speed would never be used I find but the really really steep hills.

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Old 07-28-09, 07:24 AM   #10
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Not sure if anyone cares or even rides one of these triangles anymore besides me but I wrote to schlumpf and they told me to wait till september!? hmmmmm. Hopefuly it'll be cheaper than the 6 bills since they are mass producing this for Ming cycles.

here's the response:

we will have a Strida version available soon (see photos attached).
Price not known yet.
Please come back to our website by September. Thanks.

Best regards
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File Type: jpg DSC00026(2).jpg (91.6 KB, 11 views)
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Old 07-28-09, 06:09 PM   #11
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Azreal, I've ridden on a Strida for over a year now and am very intererested in the two-speed retrofit. There are times when I'd just like to go faster. However I'm theoretically happy with the gear range - I agree that 56 is a good enough low, but 92 is way too high in my opinion for a Strida. High gear on my Brompton was 86 and I almost never used it.

On the other hand - why not give people the option for a retrofit. It would seem the only difference is the back "cog" size, probably a cheap part.
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Old 07-29-09, 03:53 AM   #12
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You normally have to use a cone cutter to alter the BB and then bond the Speed-drive into place, anyone that sells the speed-drive will have one of these & it can usually hired, so, as far as I know, it would not just be a case of buying the retro fit kit & a new rear pulley.

On the other hand, I could be talking complete tosh!
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Old 07-29-09, 07:08 AM   #13
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Chop I think the retrofit will be a direct bolt on to the existing strida without any frame mods. If you look at the pics two posts up, that was sent to me from schlumpf and somehow that is the identical part on the MAS special edition! From the close up view of it, the entire thing seems to be just a screw on part and still keeps the ability to tension the belt when needed.

Amuro Lee on stridaforums posted this of the new strida 6 and the frame is the same (mostly cosmetic changes) but they all are two speed now and it looks like the part above! I'm hoping the price will be semi reasonable upgrade since they are mass producing this part.

http://www.flickr.com/photos/polodel...7619147226838/

MakingMark you're right about not needing too high of a gear, I guess I was getting carried away with the gearing. at 80+ it's only useful if it's on a slight downhill else i'll be dead tired mashing those pedals for an hour. The range they will offer from the 40's to 70's should be very adequate on that retrofit. Another recent post from a brompton owner also stated he compared his 50s - 70s gearing brommie was more useful then his other bike with a 31-91 gearing. That rear cog upgrade you mentioned would be cheap and actually good but then they wouldn't make as much money off us! I'll wait for the price announcement of the two speed else 18 inch wheels would be a good middle balance of speed and pedability (if that's even a word).
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Old 08-05-09, 12:17 PM   #14
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OK I'll put my hand up, I was blonde until the age of eleven & I must have regressed!

Of course the Strida BB is fixed by virtue of the tightening screw on the snail adjuster, therefore no cone-cutter or bonding needed! Sorry for the bum suggestion!
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