BOS Kirk Shock

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BOS Kirk rear shock

The BOS KIRK shock had been made for the highest level of enduro racing and riding. Each unit has been hand made in Toulouse France to Industry leading levels of precision and craftsmanship.
Similar to all BOS Air suspension units, the Kirk is as progressive as a coil spring, but with the weight benefits of an air spring. Custom tuned to suit any bike, the Kirk will help you get the most from your all mountain bike.

The quality of the damping is what set BOS apart from other manufactures. The combination of sensitivity and support is unrivalled. In part to the open bath damping cartridge. Precise adjustments can be made to the High and low speed compression circuits, as well as rebound all on the piggyback of the shock.

BOS have developed an intelligent pedalling optimiser, which splits the hydraulic flow to the compression, consequently removing pedal bob but small bump traction stays.

Due to each shock having a custom hydraulic curve depending on the frames progressiveness. It is imperative that you contact us to with your frames details so that we can get the correct shock for your frame.

As with all BOS suspension products, even minor service intervals are far longer than any other suspension manufactuer in the industry which means actual day to day running costs are reduced due to the sheer quality of the materials used to build these handmade products. In short, a BOS fork or shock, can be fitted and does not require such frequent attention as much as rival products.


340 grams
Fitted settings for each bike
High Speed Compression
Low Speed Compression
Rebound adjust
Intelligent pedaling optimizer
Internal air volume adjustment
216/200 length options

BOS Servicing

We can now offer full BOS servicing for both Forks and Shocks via the distributor Jungle Products. For more information or to book your Forks/Shock in with Jungle, please call the shop on 01423 780738


Black / 200x50mm (KI02):
Santa Cruz 5010/Solo Carbon Alloy 2013/2104, Santa Cruz bantam.

Black / 200mm (KI04):
Banshee Spitfire V2, Commencal Absolute SX, Cove Gspot, Giant Trance 26" 2013 All Models, Giant Trance 27.5 2014, Ibis Mojo HD 140, Ibis Mojo HDR 650b, Nolly Chilcoltin, Marin ATTACK TRAIL CARBON MRN-03-2, Rotwild FS 26", Saracen Ariel 2011

Black / 216x63mm (KI02):
SC Heckler 650b, Nomad v2 2011, Santa Cruz Blur LT 2011, Pivot mach 6 2014, Transition patrol, Whyte g-150, Yeti SB66, Yeti SB6c

Black / 222mm (KI02):
Kona entourage 2012, Transition Blindside 2011/170

Black / 222mm (KI03):
Trek Session 88 2009 - 2012, Specialized Status 2012 - 2014, Santa Cruz VP Free,

Delivery & Returns

Unless otherwise specified we will use a Royal Mail Tracked Delivery service to dispatch your order. Once your order is dispatched you will receive an email with a tracking number. You are able to track your order at

For high value, pressurised or liquid goods we use FedEx Tracked 24hr service. FedEx Orders can be tracked at


Orders under £19.99

Royal Mail 48 Tracked: £3.49

Royal Mail 24 Tracked*: £4.49

Fed-Ex**: £6.50

Orders £20 - £49.99

Royal Mail 48 Tracked: £2.49

Royal Mail 24 Tracked*: £3.49

Fed-Ex: £5.99

Over £50 - £99.98

Royal Mail 48 Tracked: FREE

Royal Mail 24 Tracked*: £1.00

FedEx 24 Hour: £3.99

Over £99.99

Royal Mail 24 Tracked*: FREE

FedEx 24 Hour**: FREE

* Royal Mail 24 Tracked Next Working Day if ordered before 3.30pm Mon-Fri

**FedEx 24 Hour for orders placed before 12:00pm Mon-Fri

*Orders shipping to Northern Ireland via Courier will be subject to a delivery charge, we will be in touch upon receiving your order to discuss your delivery charge or you can Contact Us to discuss pricing prior to ordering.

Bike Orders

All bikes and frames are shipped with FedEX 24hr Tracked Delivery within the UK. Bikes are assembled and fully checked by our mechanics prior to dispatch, therefore lead times can vary. One of our sales team will contact you upon receipt of your order to arrange a suitable delivery date

International Orders

International Orders are sent using Royal Mail International Tracked Delivery. These items are usually delivered within 3-7 working days of despatch.

All International order postage costs are an estimate. If the estimate is correct your order will be shipped immediately. In the rare event that the postage estimate won't cover your delivery we will contact you with a postage quote.

For full details of our returns policy, follow this link.