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Transmission / Re: Thorn 110mm 5arm Reversible SINGLE ring 42T
« Last post by swayzak on Today at 01:41:55 PM »
Quote from: Andyb1 on Today at 10:25:33 AM
42T will be the number of teeth - on the SJS site you can say what size chainring you want.

There are two different rear sprocket types for Rohloff - the older style screw on type and the later design with a clip.  You need to know which type your bike uses.  And obviously tooth count.

Whereabouts are you?   If your bike has the screw on type you will need a special tool - perhaps easier done by a Rohloff dealer?

Doh! Yep I see that now, thanks

Will check teeth on rear sprocket as well
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Transmission / Re: Thorn 110mm 5arm Reversible SINGLE ring 42T
« Last post by mickeg on Today at 10:57:24 AM »
I think the generic default Rohloff sprockets fitted to bikes sold by Thorn was 17 teeth, but you can easily check to confirm what you have. 

But the default Rohloff sprockets that came with a Rohloff hub if purchased elsewhere was 16 teeth.  I built up my Nomad Mk II, bought my Rohloff hub elsewhere, I have 16 teeth on mine.
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Transmission / Re: Thorn 110mm 5arm Reversible SINGLE ring 42T
« Last post by Andyb1 on Today at 10:25:33 AM »
42T will be the number of teeth - on the SJS site you can say what size chainring you want.

There are two different rear sprocket types for Rohloff - the older style screw on type and the later design with a clip.  You need to know which type your bike uses.  And obviously tooth count.

Whereabouts are you?   If your bike has the screw on type you will need a special tool - perhaps easier done by a Rohloff dealer?
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Transmission / Re: Thorn 110mm 5arm Reversible SINGLE ring 42T
« Last post by swayzak on Today at 08:04:31 AM »
Thanks

Ah, I thought 42T referred to number of teeth!

So I think this is the same model (will count number of teeth on current one)

I can't see the rear sproket (for Rohloff) listed on my original invoice - is there a likely replacement candidate for this as well?

I'm looking at changing the whole drive train as pretty worn now
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Transmission / Re: Thorn 110mm 5arm Reversible SINGLE ring 42T
« Last post by PH on Today at 12:40:16 AM »
Is it not this one?
https://www.sjscycles.co.uk/chainrings/34-thorn-110mm-bcd-5-arm-reversible-single-chainring-332-inch-black/
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Transmission / Thorn 110mm 5arm Reversible SINGLE ring 42T
« Last post by swayzak on November 14, 2026, 09:05:20 PM »
Hello

This chain ring came with my Sterling (2010) but I can't seem to find an identical replacement from SJS

Is the 42T version still available?

Thanks
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Thorn General / Re: What do people think of titanium bike parts?
« Last post by in4 on November 14, 2026, 07:33:01 AM »
Thanks for spotting it Dan. We're all getting a little more savvy re AI content as time goes by; slop I believe its called.
Its the never-ending questions I notice first.

BTW This now makes you the forum's first Mogger, an award I'm sure you'll be deeply proud of, particularly when you are in the company of fellow Gen Z cyclists!
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Thorn General / Re: What do people think of titanium bike parts?
« Last post by Danneaux on November 14, 2026, 01:34:28 AM »
[Admin Message]

Hey all!

Unfortunately, the OP's replies to responses had all the hallmarks of an AI training effort, and a deep dig showed a masked IP location plus a personal website and LinkedIn account that spoke of leveraging AI agents for SEO and other purposes. The account has been banned; I don't like members' time wasted for making replies in good heart.

A lot of information was made available as responses to the original query, so I'll leave the topic intact as a resource for those who may have pondered the benefits of titanium versus other materials in cycling.

Best and thanks to all who responded to what seemed a legitimate query; I caught it as soon as I could verify in a late night of effort.

Dan.
Thorn Cycles Forum Admin.
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General Technical / Re: Drop Bars on a "Long" Frame?
« Last post by Binky on November 13, 2026, 12:13:55 PM »
Quote from: Andyb1 on November 09, 2026, 08:16:24 AM
Often MTB style bars can be cut shorter and I personally find that gives me a better, narrower, position for road use.   One thing to watch out for, a lot of modern MTB bars are for ‘oversized’ clamps.

As PH has said, there are lots of different shapes of handlebar.   The MTB ones I use are 1990s style, almost straight.  The straight bar position can be made to be very similar to using the top of drop bars and if short bar ends are used they can give a position very similar to being on the hoods.  On one bike I use Ergon GP2 grips which have a built in bar end, on another cheapo ebay ergonomic grips and shortened alloy MTB bar ends.

Ergon grips can be bought with a shorter RH grip to accommodate the rohloff shifter, but I guess on a Sherpa you have derailleurs?

Yes it has derailleurs. I have a few old MTB riser bars I could try, including some rather narrow cut Titec Hellbents which were my bar of choice many years ago. Not sure if they have enough flat space for Ergon grips, brake levers and shifters, I'd have to measure them. Your point about narrow straight bars and bar ends giving a similar position to hoods is a good one, I doubt I'd be down on the drops on this bike and the straight bar option would mean I don't have to play around with drop bar brifters, cable pull adaptors etc.
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Thorn General / Re: What do people think of titanium bike parts?
« Last post by WorldTourer on November 13, 2026, 12:05:39 PM »
Quote from: Korn on November 13, 2026, 02:51:02 AM
I don’t see many people touring with lots of luggage. I imagine for that kind of riding, a solid steel setup might feel more reassuring than chasing every gram with titanium.

Even for cyclists with lots of luggage, there is a reason to chase every gram on the bike itself if you can afford it: lifting the bike.

Heinz Stücke ultimately had to retire from his half-century of bicycle travel due to a back ruined from lifting his bike. When I ride routes with obstacles that the bike has to be lifted over, or when I arrive somewhere and find out my accommodation is up a flight of stairs, the weight of my steel-frame bike even without luggage is something I’m concerned with. Switching some parts out with lighter-weight but reliable alternatives has shaved a good kilo off it.
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