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Want belt drive and internal gear hub...

Old 10-12-14, 09:41 AM
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Bmoorhouse
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Want belt drive and internal gear hub...

I am looking for a folder with both a belt drive and an internal gear hub. I have looked at the Bike Fridays, which look like great bikes. But, custom built they are more expensive and take a long time to be delivered. I may end up with one of those, but first wanted to see if anything else existed.

The other option I am considering is the Tern Verge S11i. While it does not have a belt drive, it does have the clean drive, which may be enough to keep grease and dirt off my pant legs.

Are there any other models by other manufactures that have both belt drives and IGHs?
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Old 10-12-14, 10:14 AM
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Belt drives are only used with IGH or single speed ..

If there is a way to get the belt in to the frame, and tensioned . a lot of Bikes can be retrofitted with the Belt drive Kit.

the types where the chainstay stays above the top run of the chain should work.

Bike Friday's Tikit, has a separation bolt together in the rear stay loop to let the belt pass thru.

The Silk, uses something like what was a swing arm on some suspension MTB designs , the rear dropout moves backwards to tension things.

both have the BB as part of the rear portion. so they fold as one...

Many of the fold in half DaHon/Tern types may do as well..

Last edited by fietsbob; 10-12-14 at 10:39 AM.
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Old 10-12-14, 10:36 AM
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Dahon Curve 20 is available in 3 speed, so has tension adjustment, and the single rear stay is belt-compatible.
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Old 10-12-14, 12:39 PM
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Originally Posted by MichaelW View Post
Dahon Curve 20 is available in 3 speed, so has tension adjustment, and the single rear stay is belt-compatible.
yeah.... but with limited gear ratios this would mean that you might have a gearing like 10 to 30 .... great for going staright up the wall but not somgood for regular riding
:-(
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Old 10-12-14, 12:54 PM
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So Thor , (following the topic at hand,) whats available in the Belt drive parts for the Sturmey 8 speed ?

seems the hubs are just the thing for small wheels
but the cog is bigger than the standard 3 spline at 19t +... 20,23,25.

the all overdrive 7 of 8 ratios make for not needing such large chainrings/belt cogwheels.

Gates shows standard 3 spline & screw on Rohloff ,, maybe 9 spline as well for the shimano pattern

I note more added now, including a screw on freewheel for S3X users..

Last edited by fietsbob; 11-15-14 at 10:52 AM.
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Old 10-12-14, 04:08 PM
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Dahon had the Mu Rohloff with belt,but they weren't cheap either. If a 4spd hub will work,you could try to find an old Ixi,but they come apart rather than actually folding.

If your main concern is cleanliness,then a chain guard or one of those chain coverings Dahon and Tern are using will work just fine and greatly expand your choices. Note,that covering is just wire covering used in conduits and is available at hardware stores and Lowes/Home Depot. A couple friends used it years ago for polo to cover chains and exposed rings.
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Old 10-12-14, 05:17 PM
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I find that with lightweight bikes, the advantages of staying light often outweigh the advantages of all those inbetweeny gears. You can always switch the hub.
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Old 10-12-14, 07:10 PM
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Our Downtube 8H is being introduced for about $700 as a backorder special. The bikes will be shipping at the end of this month.

The 8H has a Shimano Nexus 8 hub, and Gates belt drive.

Thanks,
Yan
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Old 10-13-14, 04:22 AM
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I just don't get IGHs unless you're trying to build up big beefy arm muscles. My gfs Ciao is so damn heavy, it's nuts. A lot of Dahons have a chain guard on the crank set. Besides, don't kid yourself....ride long enough, and gonna get dirty.
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Old 10-13-14, 08:40 AM
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I just don't get IGHs
Which ones have you tried , Jim?


Gates Belt drives cannot derail or bend tightly like chains.
how else to have more than one gear with them?

Requirements : frame opens, since Belt wont, and It has to be stretched Tighter than a single speed/IGH Chain does

And Gates has to make a Cog for it so the 3 spline S-A, 9 spline shimano and Screw on Rohloff are your IGH choices currently
https://www.gatescarbondrive.com/products/cdxsprockets

sorry you wont get off on the cheap.

Last edited by fietsbob; 11-15-14 at 10:48 AM.
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Old 10-13-14, 01:16 PM
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Thanks for the responses everyone.

I would be open to a three speed if the gear range was large, but the problem with the Dahon Curve is that it only offers 42-77 gear inches. That is not enough at either end.

As for the Downtube, I did an admittedly quick Google search and found the company website, but could not find any recent reviews, photos of it folded, or videos of the folding process.

Originally Posted by jimboach View Post
I just don't get IGHs unless you're trying to build up big beefy arm muscles.
IGHs are good for commuters as they are cleaner, require less maintenance, and are less susceptible to damage.
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Old 10-13-14, 01:35 PM
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Strida Evo: belt drive, 3-speed internal gear bottom bracket.
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Old 10-13-14, 01:36 PM
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Dynamic Sidekick: 8-speed IGH, shaft drive.
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Old 10-13-14, 02:39 PM
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What kind of riding are you going to do? Why are you getting a folding bike?
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Old 10-13-14, 03:15 PM
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I believe this is what you are looking for.
Gates carbon belt
7-speed SHIMANO NEXUS 7 rear hub

TILT 740 FOLDING BIKE Beige B'TWIN - All Bikes Cycling - On sale at Decathlon.co.uk

And it's cheap but good quality. I have used three of their bikes (BTWIN) and they are very good. I haven't used this one, but tried this in their store and feel it's sturdy and stylish, a bit heavy but can be rolled away when folded. And with that one second fold, but I am not a fun of this mechanism so went for another one . Just google around for the views on their bikes and you will know these are value for money.






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Old 10-14-14, 01:32 PM
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Originally Posted by tcs View Post
Dynamic Sidekick: 8-speed IGH, shaft drive.
I had never heard of a shaft drive, very cool concept. Unfortunately, there are very few reviews of the Sidekick 8 available online, and those I could find were not terribly complimentary to either its build quality or its ride relative to other bikes in its price range. Too bad too as the idea sounds awesome.
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Old 10-14-14, 01:34 PM
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Originally Posted by Schwinnsta View Post
What kind of riding are you going to do? Why are you getting a folding bike?
I have a 23 km commute with a decent amount of climb in either direction. Sometimes I bike all the way there and back; other days I simply bike to the train station.
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Old 10-14-14, 01:57 PM
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Originally Posted by tcs View Post
Strida Evo: belt drive, 3-speed internal gear bottom bracket.
I had seen these around town a few times. They are very interesting bikes. Unfortunately, with these, I am not sure I would like the more upright riding position. And again, the three speed range is limited, which would be a problem for me on the hills I encounter on the way to/from work.

Thanks for the suggestion though.
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Old 10-14-14, 02:01 PM
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Originally Posted by nz6666 View Post
I believe this is what you are looking for.
Gates carbon belt
7-speed SHIMANO NEXUS 7 rear hub

TILT 740 FOLDING BIKE Beige B'TWIN - All Bikes Cycling - On sale at Decathlon.co.uk
It is actually hard to find reviews on this specific model, though like you said the Decathlon line is generally regarding as being of good quality. That being said, I am not sure about the fold mechanism. I wish I could find something online that reviews this specific bike.
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Old 10-14-14, 02:16 PM
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There are some video reviews such as this one:
https://www.youtube.com/watch?v=fI4TjxRE0tY

Best if you can try it if a Decathlon store is available to you.
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Old 10-14-14, 02:31 PM
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Originally Posted by Bmoorhouse View Post
I have a 23 km commute with a decent amount of climb in either direction. Sometimes I bike all the way there and back; other days I simply bike to the train station.
For the train I think Brompton, only 6 speeds, on the slow side, and expensive, but it has a great fold and use a road bike for the full ride in. Brompton can do it all but that is what I do. Also consider a Bike Friday tikit.
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Old 10-14-14, 02:42 PM
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Originally Posted by Schwinnsta View Post
For the train I think Brompton, only 6 speeds, on the slow side, and expensive, but it has a great fold and use a road bike for the full ride in. Brompton can do it all but that is what I do. Also consider a Bike Friday tikit.
Thanks for the suggestion.

I assume that you ride round trip on the days you ride in. What I am actually trying to do is bike in and ride the train home with the bike or vice versa, so I can ride again the next day. Hence, I need a bike that can handle the full commute and fold up for the train.

I looked at the tikit, but I would like to stay away form 16 inch tires. If I were to go with a Bike Friday, it would probably be the Silk.
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Old 10-14-14, 03:12 PM
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As a shop mechanic who has dealt with and test rode bikes with belt drives (Spot, Trek) I tend to think that belt drive is overrated. For as much positive as belt drive brings to the table, there are also negatives.
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Old 10-16-14, 01:30 AM
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Originally Posted by mconlonx View Post
As a shop mechanic who has dealt with and test rode bikes with belt drives (Spot, Trek) I tend to think that belt drive is overrated. For as much positive as belt drive brings to the table, there are also negatives.
I am aware of potential issues with snow accumulation, but have not read many other negative issues associated with the belt drives. Can you give me an example or two? Thanks for the input.
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Old 10-16-14, 04:37 AM
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Originally Posted by Bmoorhouse View Post
I am aware of potential issues with snow accumulation, but have not read many other negative issues associated with the belt drives. Can you give me an example or two? Thanks for the input.
+1,I also have a very idealistic view of belt drives, please give me some info so I don't go blowing bucks that I might be sorry about.

Two issues I think might be issues... One, you can't stand on the pedals (something I do all the time on climbs) and two, the belt is prone to skipping unless snubbed very well.
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