Thorn Drop Bars for Gilles Berthoud Rohloff Shifter - 25.4mm Clamp - Black

Customer Reviews (2)
4.5 / 5| Write your review
£29.99 Please note this product has selling restrictions to your country. was
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We wanted some drop bars which would maximise the functionality of the shifter Gilles Berthoud has made for the Rohloff hub.
It is no use having fantastic bars if your choice of stem is limited. We have an awesome quantity of different lengths and angles of stem available but these are in 25.4mm diameter. We decided to have the bars made with a 25.4mm diameter centre to allow us to draw on our stock of stems.
We wanted to fit the shifter as close as possible to the stem, to maximise the amount of useable straight bar on the “tops” of the drops. We did this by making the parallel section of the centre swell as small as possible (40mm). We also made the taper from 25.4mm to 23.8mm (the standard diameter of drop bars) as short as we could, commensurate with avoiding the production of a stress riser in this critical area.
We could only afford to have one width of bar made so we decided to have a medium drop and a medium forward reach with a relatively wide 44cm centre to centre width. This width gives valuable extra straight section of the bars and is a great choice for touring.
Although we don’t expect to use the “hooks” very often, we knew that we must take advantage of the anatomical shapes which are available.
Finally what would be the point of making a specific bar for use with a Rohloff hub if we didn’t use the finest possible material to make it from?
We were advised that, for such a shape, we should choose double butted Al 6061…so we did!
Product Reviews (2)
Questions & Answers (4) Q & A
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Product Reviews (2)
Overall Product Rating 4.5 / 5
Nice bars, but....
By Jon Moore
05 Aug 2019
4 / 5
I recommend this product
ConsAs above.
ProsAs advertised.
I realise these bars are produced specifically for the Berthoud shifters mounted near the stem.

However, due to the attractive price and declared suitability for touring, I purchased a bar. Additionally I planned to change from down tube shifters to Dia-Compe ENE shifters with matching bar end pods.

Unexpectedly, both handle bar tube ends had a pronounced taper caused by the method of parting off the tube during manufacture and a degree of ovality in the tube bore at approximately 35mm into the bore. Quite some time had to be spent dressing the tube bores at each end before the bar end shifter pods, expander bolt and split collets could be fitted. Not a huge problem but totally unexpected!

Future customers for this item please note the above comments.
As Described, Berthoud Shifter Sits Close To Stem
By R Flynn
17 Jan 2013
5 / 5
This works in its stated design, the Gilles Berthoud shifter sits close enough to the stem that there is a full handspace on the top bar. The prevalence of O/S or 31.8mm stems means you have restricted choice on stem choice, may or may not be an issue, the Thorn one worked fine for me.
Good price.
Questions & Answers (4)
Can I use this drop bar with these stem and v brakes?
22 Sep 2022
Can I use this drop bar with these brakes? "Tektro RL520 Aero V Brake Levers". And with this stem: "
Zoom Alloy 1 1/8" Ahead Stem 7 Deg - 25.4mm Clamp.?
Thank you for your enquiry. Yes, you would be able to use the brake levers & stem you have listed with these handlebars. I hope this helps.
Kind Regards. JP 23/09/22
What Is The Width C-C Where The Brake Levers Would Mount...
31 May 2017
...and at the ends of the bars also? (I'm hoping they're less than 44cm at the hoods.) Thanks.

The centre to centre width of these handlebars is 44cm and the width between the end of the bars is approximately 46.5cm.

Hello, What Is The Reach And The Drop Of The Bar? Thanks.
03 May 2017

The reach of the bars is approximately 140 mm and the drop is approximately 170 mm.

Handlebar Stem Diameter 26
08 Jul 2015
Is this bar suitable? My present handlebars are 26 mm dia.

Unfortunately this set of handlebars would not be compatible with your current stem, these bars have a 25.4mm clamp diameter. If you wanted to fit them you would have to change your stem to one with a 25.4mm clamp as well I'm afraid.