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Thorn Quick Release Lever M6 to Replace Allen Key Seat Bolt of most Thorn Bikes

Customer Reviews (1)
5 / 5| Write your review
£4.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
M6 x 30mm long, black arm.
This QR does not fit alloy seatclamps or frames without M6 thread
Product Reviews (1)
Questions & Answers (4) Q & A
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Product Reviews (1)
Overall Product Rating 5 / 5
Convert Your A-Head Stem To Quick Release For Storage
By Matthew
05 Oct 2010
5 / 5
I recommend this product
ConsI wish someone would start making dedicated quick release ahead stems!
ProsM5 bolt fits ahead stem, should allows it to clear stem clamp
As I have to store my bike indoors to avoid it being half-inched off the mean streets of Islington in central London, I was keen to find a way of turning the handlebars sideways to reduce the space it takes up.
I was looking for a QR with a shoulder, so that the lever would clear the stem when closed. These Thorn QRs do the job, though a specific product would be a bit neater. Strangely, nobody else in the world seems to have bike storage problems, because a quick-release ahead stem is not only unavailable, but it seems nobody has every thought of it before.
Anyway, I used two of these Thorn quick releases to convert my standard ahead stem to a quick-release system. This now allows me to turn the handlebars sideways so that the bike takes up much less space. I've been using it for a fortnight now without problems. Result!
Questions & Answers (4)
Quick Release Lever M5
08 Jan 2021
I see you have Quick Release Lever M6 from Thorn. With thread to the end of the bolt.
Im looking for a simulair product with a M5 bolt. Do you have four of these in stock?
Sadly we do not have a version of this in m5 to suit.

Thanks, 12.01.21
Is this compatible with my Thorn Sherpa touring bike seat clamp?
06 Oct 2020
Hello, yes as the Sherpas use M6 threading for the seat clamp.

JK 08.10.20
Could Be Used With These Seat Clamps?
09 Jun 2017
Please, could in your opinion be used to replace the bolt of these kind of seat clamps?

SJS Part #11024D286

SJS Part #23605S286


Unfortunately the seat clamps that you mentioned will not work with this product.

Please Confirm The Diameters And Lengths At Thread End
23 Apr 2015
Is threaded portion 30mm long? What is the diameter and length of the boss next to the thread? What is the diameter of the flange next to this boss? I need to know if it will fit my existing seat clamp. Many thanks.

The threaded portion is 16mm in length. The diameter of the boss is 8mm and it is 4mm in length. The diameter of the flange next to the boss is 16mm.