Recent Posts

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Belt Drive / Re: Belt drive article from Thorn Blog
« Last post by JohnR on February 24, 2026, 05:30:11 PM »
A big minus of the belt drive system is the cost of changing the overall gearing ratio which needs replacement of two of the three drivetrain components.

And belts need to be kept clean to ensure optimum performance. I had a belt drive bike some years ago and rode it through a winter. I spent a lot of time trying, unsuccessfully, to identify the source of creaks. When spring arrived I gave the bike, including the belt, a good clean. The creaks disappeared.
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General Technical / Sherpa dimensions?
« Last post by steveparry on February 24, 2026, 03:12:32 PM »
I have a Sherpa Mark 1 - I think see photos in the For sale section. I know it's a 535L. Does that signify the frame dimension ie one of the tubes is 535mm long? Also does anyone have a link to an old catalogue that describes this bike? I guess the mark 1 was made around 2005 - 2010? Thanks.
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Bikes For Sale / Re: Sherpa Wanted
« Last post by steveparry on February 24, 2026, 02:37:31 PM »
See my ad just reposted above.
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Bikes For Sale / Re: Sherpa 535L
« Last post by steveparry on February 24, 2026, 02:36:20 PM »
Still available.
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Belt Drive / Re: Belt drive article from Thorn Blog
« Last post by Tiberius on February 23, 2026, 10:58:21 AM »
A quick heads up for anyone running a belt drive.

SJS are currently running an offer on SOME belts - I've just bought a 113T for half RRP.
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Electric Conversions of "Manual" Bikes / eBike Motor Reliability
« Last post by Danneaux on February 22, 2026, 11:09:32 PM »
Hey All!

A valued member contacted me to suggest the following video "article" by Alee Denham on the reliability of eBike motors might be of interest to those considering either a conversion of their existing bikes or the purchase of a new eBike. After viewing the video -- and finding myself surprised at some of the reported data -- I thought I'd pass it on...

https://www.youtube.com/watch?v=xOZf0U1XsoE

Best, Dan.
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Belt Drive / New "Child Board" for Belt-drive related topics
« Last post by Danneaux on February 22, 2026, 09:49:38 PM »
Hey All!

At the private suggestion of a valued member, I've created this "Child Board" under the Transmission Parent Board for belt-related topics...and then populated it with past posts that were scattered throughout the Forum boards, mostly on the Transmission board. This is a start; as the week progresses, I'll sieve through the files, looking for more on this topic -- I'm sure I missed some in this first go -- and transfer them to this board.

[Edit/update: I *think* I have now assembled most of the dedicated belt-drive content here. However, this is not exhaustive, as there are mentions and discussions of belt-drives on other boards/in other topics and discussions around the Forum as minor or sub-topics to others. To find these, use the Forum's Search function for the following terms...

Belt, belt drive
Gates
Centertrack
CarbonDrive, Carbon drive
Veer
Snubber ]

It was time, especially as Thorn have now offered belt-capable bikes for awile and belt drives are more common than in the past. Hopefully this will make finding posts related to the topic a bit more convenient than using the Forum's Search function.

After things have been up and running for awhile and people are more used to looking for topics here, I'll go back and delete the redirect notices for each moved topic.

At some point, I may need to make a separate board for e-bike modifications and related topics. Conversions are likely to become more popular as time goes by and it would be nice to have the valuable information already posted relocated to one place.

All the best, Dan.

Danneaux, Thorn Cycles Forum Administrator
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Belt Drive / Re: Belt drive article from Thorn Blog
« Last post by mickeg on February 22, 2026, 01:21:31 PM »
I just watched a youtube video.  And at the end of it, it of course displays some other video suggestions which I usually ignore.  But the title of this one intrigued me, so I started to watch it, and watched the whole thing. 

Short summary is that belts are great for commuters, but a spare belt that is not stored and handled properly can fail when you are in the worst place for a failure.
https://www.youtube.com/watch?v=nx5nN3kyx5k

Note to Dan:  There are not many posts specific to belts, but there probably will be more.  Has the time arrived to put belt drive threads in their own belt drive section?
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Bikes For Sale / EBay Enduro S/M
« Last post by in4 on February 21, 2026, 09:50:10 PM »
Not mine. Good price atm.

https://ebay.us/m/KBGZY1
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Cycle Tours / Enjoyable Youtube videos.
« Last post by brummie on February 21, 2026, 07:50:11 PM »
Found these Youtube touring videos . Might be of interest to members of this forum ( Nomad and Rohloff equipped mtb content )

 https://youtube.com/@rasadventures-zr1ge?si=dUSP6lfAdIjzW7TU
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