Vorsprung Smashpot - Fork Coil Conversion System

Vorsprung Suspension Vorsprung Smashpot - Fork Coil Conversion System

Product Description


The Vorsprung Smashpot - a fork coil spring conversion system for singlecrown enduro forks, featuring externally adjustable hydraulic anti-bottoming technology to deliver precisely the amount of bottoming resistance you need.

Please include your preferred spring rate at the checkout; Click here for spring rate charts


  • Compatible with Fox 36 (2015+) and Rockshox Pike/Lyrik/Yari/Revelation (35mm) forks, Marzocchi Z1 2019 +. Read down to the bottom of the page for fitment notes.
  • 130-180mm travel, internally adjustable using included spacers. (Note - max permissible travel for your fork is determined by the fork manufacturer and may be less than 180mm)
  • Full tool-free control over bottoming resistance. 
  • 11 coil spring rates available, from 30lbs/in to 80lbs/in precision wound in 5lbs/in increments.
  • Rider weights from 45kg (100lbs) to 125kg (275lbs) catered for.
  • Universal cartridge kits require only new top caps to be moved between different forks (and foot studs if different fork brands).
  • Springs are guided and isolated internally and externally to reduce spring buckling and knocking, minimising noise.
  • Spring guiding system also means less rubbing, less wear and less contamination of the bath oil.
  • Utilises more oil for superior bushing lubrication and smoothness.
  • Only coil conversion system on the market allowing 180mm travel.
  • Easy and cost-effective to transfer from one fork to another.
  • Allows full use of travel even for very light riders
  • No harsh bottoming.
  • Reliable and low maintenance.
  • User installable and serviceable.
  • Designed, developed and manufactured in Whistler, Canada. 
  • Weight increase of approximately 250-450g (dependent on spring rate and fork's existing spring system).
  • System includes one universal Smashpot cartridge kit with brand-specific food stud, fork-specific topcap and spring.

Vorsprung's engineering is straightforward and no-BS and so is their marketing: if your first priority for your fork is outright performance, get yourself a Smashpot.


Why Coil?

Air springs have improved substantially over the years - and Vorsprung have been at the forefront of air spring development for years, so they've got no bridges to sell you. Yeah, coils are heavier than air, and for some riders that alone is a dealbreaker - fair enough. The advantages of coil springs, however, are clear:

  • Zero stiction or friction in a coil spring. And there never will be.
  • Zero spring rate variation.
  • Zero moving seals in the spring system to wear out, cause friction or leak.
  • Zero temperature effect on spring rate. 
  • Zero altitude sensitivity.
  • More oil in the fork - lubrication and service life are improved.
  • Day in, day out, the fork just straight up feels good.
  • In short, improvements in sensitivity, grip, compliance, mid-stroke support and consistency, with reductions in harshness and hand pain.

Low weight aside, air springs outperform coil springs in one critical area: bottoming resistance. 

Enter the Smashpot.

Extenally adjustable, speed sensitive hydraulic bottoming control valve

The heart of the Smashpot is a speed sensitive shimmed valve which engages progressively and seamlessly in the last 50mm of travel to effectively manage high energy and low energy inputs without harshness. Easy tool-free external adjustment ensures you get as much or as little bottoming resistance as you need. Light and smooth? Easy. Big and aggressive? Just as easy. Turn a dial and you're sorted.

Why go this route?

Unlike conventional hydraulic anti-bottoming cones, the longer displacement over which it is effective and its speed-sensitive shimmed valve means the Smashpot can dissipate more energy with lower forces, bringing the fork to a gentle stop at the end of the travel in a smooth, controlled manner.

Compared to alternatives such as elastomer or pneumatic bump stops, the Smashpot doesn't involve components physically colliding mid-travel. And unlike air springs and pneumatic bump stops, it dissipates energy rather than storing it and throwing it back at you, further stabilising the bike. There's no air spring seals, meaning fewer potential points of failure in your fork, no spring stiction, fewer wearing seals, and no need for a shock pump - ever. 


  • How much weight does it add?
    It's heavier than your air spring by between 250-450g, depending on spring rate (firmer springs are generally heavier) and the fork's original spring system (TALAS/DPA are typically heavier than Float/Solo Air). If the weight bothers you, you may be more interested in a Luftkappe Fox/ Luftkappe RockShox
  • Can I convert my fork back to air afterwards?
    Going back to air, should you wish to, is not an option - spring rub can score the inside of your stanchion, so the piston may not seal again. The spring is both isolated and guided to minimise stanchion knock and rub, however there are no guarantees an air spring will seal again after riding with a spring installed. We'd be pretty surprised if anyone actually wanted to do this after riding the Smashpot though. 
  • Do I need any extra parts to change the travel?
    All spacers required are included with the kit. The only thing you may want is more heat shrink for the cartridge tube, as it's installed after travel is set internally.
  • Does it void the fork's warranty?
    As with any aftermarket modifications, it should be expected to void the fork manufacturer's warranty.
  • What versions of the Pike does it fit?
    It is available for all 35mm Pikes in 27.5" and 29" from MY2014 onwards (no fitment for 26") in Boost and non-Boost. 29" forks need to use the included adaptor to lengthen the top cap.
  • What versions of the Revelation does it fit?
    It fits all 35mm versions of the Revelation from MY2018 onwards.
  • What versions of the Lyrik/Yari does it fit?
    It fits all versions of the Lyrik & Yari from MY2016 onwards. 
  • What versions of the Fox 36 does it fit?
    It fits all versions of the 36 from MY2015 onwards EXCEPT Pedelec e-bike specific forks. IMPORTANT: Check with Fox using your serial number  to check your fork's maximum permissible travel if attempting to run your fork with the Smashpot over 160mm if this is more travel than it currently has. 
  • Will it fit any other forks?
    Other applications are under development. Got a fork you want to see it made for? Contact Vorsprung and let them know.

Fitment notes:

Not currently compatible with Fox 36 Pedelec (e-bike specific) forks.
Not currently compatible with any 26" forks.
Not currently compatible with any 34mm stanchion forks. 
No compatibility with any 32mm forks.
Fork maximum travel is set by the manufacturer. DO NOT configure the Smashpot to exceed manufacturer-specified max travel. If in doubt, call the original fork manufacturer to determine maximum permissible travel.

Typical fork maximum permissible travels:

Lyrik/Yari 27.5"/29" - 180mm
Pike/Revelation 27.5/29" - 160mm

36 Float/Talas 27.5" - 180mm OR 160mm - call us with your serial number to check max travel prior to setting Smashpot to more than 160mm travel.

36 Float/Talas 29" - 170mm OR 160mm - call us with your serial number to check max travel prior to setting Smashpot to more than 160mm travel.


Z1 2019+ 27.5" - 180mm
Z1 2019+ 29" - 170mm


For spare parts, if they are in stock we will send them out the same day if we receive the order before midday (except weekends). If we receive the order after midday, we will do our best to despatch them same day, but it may be the following working day. Orders placed after 3pm on Friday will be despatched on the following Monday. We normally send spare parts by Royal Mail post (see below or our 'Shipping' page for cost/delivery times).

Forks, shocks and large/heavy orders including bike frames go by courier. UK deliveries are with UPS, for overseas customers it's UPS, FedEx or DHL.  In all cases these are fully tracked services and you'll need to sign for the delivery - please provide a suitable address with extra instructions if necessary.


You may return your order unused, within 14 days for a refund if you no longer require it, provided it is returned with its original undamaged packaging and is unused and unmarked. Please note, we do not refund postage unless items were supplied in error or are faulty.

Picking mistakes do sometime happen. If we supply the wrong part or there are parts missing from your order please let us know within 14 days of receipt so that we can correct the mistake. In the case of picking errors we will refund your postage costs on the returned item.

Faulty goods will be replaced with the same item or suitable equivalent, as appropriate.

TF Tuned cannot be held responsible for the non-receipt of returned goods so please ensure you use a tracked and/or insured service as appropriate to the value of the goods you are returning.

Customer Reviews

"Fast delivery, super product. Best thing to make your fork dreamy. Vorsprung spring recommendation was spot on, 55lb for 100kg rider. "
Star Rating 5
"Worth every penny. I have it installed in my both forks - Fox 36 GRIP2 and Lyrik RC2. Compared to air spring much improved sensitivity in small bumps, no any problems with mis travel suport. Even in very wet and slippery condition traction improved and surprisingly good. The only disadvantage is the sacrifice of few grams which you completely don't feel during the ride but visible on the balance...be careful with spring rate as for me you can go below the official table recomendation, of course depends on your trails. As usual perfect advice and delivery time from TFtuned"
Star Rating 5
Staff response...
"#oncoil really good to hear you are loving the Smashpot conversion Tomasz! Ruth @TFT"
"Excellent service "
Star Rating 5
"OMG Wow!!! Installed this on my 2020 Commencal Metapower SX which has a coil rear shock , to say I am blown away is an understatement, the control in wet steep rooty slippery trails is sublime, now the front matches the rear in feel, i honestly didn't think the 2020 Lyrik could feel better but boy was I wrong , I'll be slapping one on my Nomad 4 as well . Buy and never look at air again."
Star Rating 5
"My Fox 36 float were not good on small bumps, and soft on mid stroke even with tokens. So i was going to go with the negative air conversion but figured if the coil was a good as the old Van set up it would be worth it. Well it's better all the small bump and you can run a med/soft sprint and not bottom out it also give you great mid stroke support. It feels like a DH bike now and smashes through we roots like its dry. you would never notice the extra 300g. I weight 102kg in gear but i found the 60lbs spring too hard to went for the 55lbs. I think the spring chart is set for steep dry with a pro riding as they are very hard, so go for the softer spring. Good instructions to fit yourself. Really happy with the set up. Way better than air. "
Star Rating 5
"If your thinking about it just buy it. Absolutely mega!!! Just make sure you get the crush washer for the damper nut. "
Star Rating 5
"Purchased this coil conversion for my revelation fork hoping for some nice plushness out on the trails, wow!! What can i say. My confidence has doubled with trail riding in the wet and over some narly jumps. Best upgrade yet to my 2018 levo. 85kg fully kitted rider, went for the 45lbs spring, perfect!! Thanks TFTUNED!! Awesome service!!! "
Star Rating 5
Staff response...
"Amazing...!!!!! Really pleased to hear that this has had such a positive impact on your riding Neil. Ruth @TFT"
"Good instruction to fit in a 2018 Fox 36 and loads better than air. Fast delivery and bought the 55ib spring but after trying out for two weeks replaced with 50ib and now use nearly all the 180mm travel much more feel and long bumpy corners you now what grip you have."
Star Rating 5
"Good advice on this new product from TF, usual excellent service and delivery. Fitted the Smashpot as per Vorsprung instruction manual with no problems, although make note of the need for cone spanners and torque wrench with spanner adapter. Rides with no top out noise and no spring rattle, feels immediately better than air configuration on my Lyriks. "
Star Rating 5
"Good advice on this new product from TF, usual excellent service and delivery. Fitted the Smashpot as per Vorsprung instruction manual with no problems, although make note of the need for cone spanners and torque wrench with spanner adapter. Rides with no top out noise and no spring rattle, feels immediately better than air configuration on my Lyriks. "
Star Rating 5
"Absolutely amazing difference in feel and ride quality over the air shaft. My Fork is now supple over small stuff but has plenty of support over bigger hits. The only downside is a little more weight and a ‘clunk’on static top out, neither are issues when pressing on with fast decents though. "
Star Rating 5
"Fantastic! had a Tf coil conversion which proved a great upgrade but the Smashpot is another league. Off the go the suppleness in small chatter/bump is a amazing, combined with great mid travel support and finally the ability to increase/decrease the bottoming our resistance on the fly is spot on. I chose a 55 lb spring 78kg total riding weight running no compression damping and no bottom out resistance so I am going to purchase a 50lb spring to see what difference it will make. pikes fitted to Intense ACV + "
Star Rating 5
Staff response...
"Great to hear you are happy with it Adam. Ruth @TFT"
"Absolutely transformed my Lyrik forks in a very good way.Very plush, very supportive and the added grip is amazing. I’m still dialling them in but I’m confident I’ll find a very sweet spot. I’m a big heavy rider and have my bike built for durability so I don’t notice the extra few pounds of this kit, it’s definately not for the weight conscious though."
Star Rating 5
Staff response...
"Great to hear that you are loving the Smashpot Dave! Ruth @TFT"


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