Smashpot - Fork Coil Conversion System

Vorsprung Suspension Smashpot - Fork Coil Conversion System

Product Description

Vorsprung Smashpot - Fork Coil Conversion System

 

Run over everything.

Presenting the Smashpot - a fork coil spring conversion system for single crown enduro forks, featuring externally adjustable hydraulic anti-bottoming technology to deliver precisely the amount of bottoming resistance you need. The benefits of coil are clear: if your first priority for your fork is outright performance and grip, get yourself a Smashpot.

 Features:

  • Catering to rider weights from 45kg (100lbs) to 125kg (275lbs) with 11 coil spring rates
  • Allows lighter riders to get the most use out of their forks, and heavier riders the support they need without excessive air pressures
  • Only coil conversion system on the market allowing 180mm travel
  • Easily adjust your travel with internal spacers (please note the minimum & maximum travel of your fork as determined by manufacturer)
  • Unique Hydraulic Bottom-out System reduces harshness
  • Can be transferred between different forks with minimal parts /cost (a purchase of a new top cap or foot stud)
  • Reliable and low maintenance, set and forget. User installable and serviceable
  • Weight increase of approximately 250-450g (dependent on spring rate and fork's existing spring system)

 

SMOOTH & CONSISTENT

Why Coil?

  • Air springs have improved substantially over the years - and we've been at the forefront of air spring development for years, so we'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 no moving seals in the spring system to wear out, cause friction or leak.
  • Zero spring rate variation allowing more mid-stroke support and consistency.
  • More oil in the fork - lubrication and service life are improved.
  • In short, improvements in sensitivity, grip, compliance, mid-stroke support and consistency, with reductions in harshness and hand pain.

 

BOTTOM OUT RESISTANCE

Externally Adjustable Hydraulics

Low weight aside, air springs outperform coil springs in one critical area: bottoming resistance. The hydraulic bottoming control valve addresses this with a speed sensitive shimmed valve which engages progressively and seamlessly in the last 50mm of travel, bringing the fork to a smooth and controlled stop at the end of the travel. High energy and low energy inputs are effectively managed without harshness. Easy tool-free external adjustment ensures you get as much or as little bottoming resistance as you need at the turn of a dial. Increased stability as energy is dissipated, rather than stored and thrown back at you.

COMPATIBILITY

 

COMPATIBLE

Fox 36

2015-2021

Fox 36 e-bike (note: only spring rates below 65lbs/in)

2018-2021

Fox 36 Rhythm

2018-2021

Fox 38 

2021+

Marzocchi Z1

2019 +

Rockshox Lyrik (35mm)

2016 +

Rockshox Yari (35mm)

2016 +

Rockshox Pike (35mm) 27.5" Boost

2014 +

Rockshox Pike (35mm) 27.5" Non-Boost

2014 +

Rockshox Pike (35mm) 29" Boost

2014 +

Rockshox Pike (35mm) 29" Non-Boost

2014 +

Rockshox Revelation (35mm)

2018 +

Rockshox Zeb (180mm max travel)

2021+

DVO Onyx SC

2019+

Ohlins RXF36

m.2 (Ohlins do not do year model releases)

 

NOT COMPATIBLE

Rockshox Pike (35mm) 26" or any other 26" forks

Rockshox 35 Gold / Silver

Any 32mm stanchion forks

Any 34mm stanchion forks

 

DO NOT configure the Smashpot to exceed manufacturer-specified max travel. If in doubt, call the original fork manufacturer to determine maximum permissible travel.

FAQ

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.

 

Can I convert my fork back to air afterwards?

Going back to air, should you wish to, may not be an option - spring rub may score the inside of your stanchion, so the the air 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.

 

Does it void the fork's warranty?

As with any aftermarket modifications, it should be expected to void the fork manufacturer's warranty.

 

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. CLICK HERE FOR SPARE PARTS.

 

Typical fork maximum permissible travels:

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

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

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

 

I'm changing travel and I want to source heat shrink myself. What size do I need?

Spring:
2:1 singlewall polyolefin non-adhesive, with an initial (non-shrunk) diameter of 1.25" (32mm). 1.5" (38mm) initial diameter will also work.

Outer tube:
2:1 singlewall polyolefin non-adhesive, with an intital (non-shrunk) diameter of 3/4" (19.1mm)

INSTALLATION & MANUAL

WARNING: VORSPRUNG products should be installed and serviced by a trained bicycle service technician, in accordance with both VORSPRUNG and original manufacturers' specifications. If you have any doubt whether or not you can properly service your suspension product, or you have not performed this kind of work before, then please DO NOT attempt it. Improperly serviced products can fail, causing the rider to lose control resulting in SERIOUS INJURY OR DEATH. That's not a joke. Don't mess around with it if you don't know what you're doing, because the best case scenario is usually that you damage something in the process. Do not perform any kind of service on your suspension whilst drunk, high or stupid. We accept no responsibility nor liability for component damage or failure of any description in the case of self-installed units.

INSTALLATION MANUAL - Fox / Marzocchi / Rockshox - DOWNLOAD PDF

INSTALLATION MANUAL - DVO Onyx SC - DOWNLOAD PDF

INSTALLATION MANUAL - Ohlins RXF36 m.2 - DOWNLOAD PDF

SPRING RATE ADVICE

Note:

  • E-bikes - Add 15lbs / 7kg to total rider weight.
  • Rockshox Zeb / Fox 38 - Riders should drop their spring rate by 5lbs/in.
  • 65lbs/in or higher spring rates should consider a revalve to ensure their rebound damping is adequate to cope with the spring force. Audible topout may otherwise occur.
  • Cells marked in blue are where a 70lbs/in spring would ideally be used but cannot due to limited max travel
  • 75lbs/in and 70lbs/in springs can be run at up to 160mm but no higher.
  • 80lbs/in springs can be run at up to 150mm but no higher.

Delivery

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 DPD Local, for overseas customers it's 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.

Returns

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 a 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

STAFF REVIEW
said...
"Awesome bit of kit, transformed my Zebs into eats everything set of forks, super supple small bump and the hydraulic bottom out ensuring no harsh g outs. I was confused about spring weight but the advice given as usual was spot on!"
Star Rating 5
Staff response...
"Great stuff James, coil for the win for sure!!! #oncoil Ruth@TFT"
STAFF REVIEW
said...
"The installation instructions were excellent, and the process is straightforward and pretty simple. Performance is awesome! Stoked I made the choice to put this in my Zeb, love it. "
Star Rating 5
Staff response...
"Coil for the win Peter! Ruth @TFT"
STAFF REVIEW
said...
"Great upgrade to my yari fork complete improvement in handling and grip. The guys at TF tuned with a great help with getting the right spring and setup."
Star Rating 5
Staff response...
"Really pleased to hear you are enjoying the upgrade Richard - thanks for leaving your review. Ruth @TFT"
STAFF REVIEW
said...
"This is a definite upgrade over the air spring. I needed a system with less faff and so far it’s living upto the hype. I found it easy to setup and install but you need to take your time also getting the spring weight right is key but the recommended 50lb for me was spot on at 87kg all up. "
Star Rating 4
Staff response...
"Nice review, Richard, good to hear you are getting on with coil! Ruth @TFT"
STAFF REVIEW
said...
"So took the Smashpot to its first proper nadge testing at off piste cannock. There is no comparison to an air fork (replaced air sprung Lyric) is there...the coil blows air forks into weeds. Wish I'd swapped back to coils years ago. The Smashpot oil damper thingy works really well - end of day I found I'd used all the travel but I had not noticed! Brilliant product. Trouble is, all my mates will want one now that they have seen how good it is!!"
Star Rating 5
Staff response...
"Excellent review Mike! Good to hear you are loving Coil. Ruth @TFT"
STAFF REVIEW
said...
"Fitted to a 170 mm float on a steel framed hardtail. I have used the system now on a good number of rides over a few months, ranging from fast jumpy trails to steep muddy enduro. As I had hoped, butter smooth, silky and a real pleasure over fast chatter inducing roots and ruts. No more numb hands. I was midway between 2 springs, and chose the softer. I could have gone even softer, because I have the leg valve fully open, and still have not used up all the travel. I guess i am becoming a bit of a wuss in my old age, certainly not hitting properly menacing drops any more. I suggest that if you aren't still hitting massive downhill style features then go for the bottom or, at most, middle grading for rider level. So saying, the fork felt lovely on fast, steep Scottish enduro trails, and gave immense grip and confidence on sections that are effectively like a cross between river beds and giant staircases. I have always loved coil springs. The new style, with various types of bottom out system, have certainly added to the sport. The smashpot was easy to fit, took about an hour, working slowly and carefully. Instructions were good from their website, just took a while to figure how to torque up via a cone spanner. I made an adaptor with neutral mechanical leverage. I could probably just have done it freehand, by feel, but I like to do things properly. It might help if they added a photo in their pdf, and some text explaining which tools and approaches work for this. Lots of crap advice on the internet on this type of thing, with people not understanding basic physics. Overall, I would buy again, totally lively, have raised my pleasure levels on every ride, boosted my descent times, and reduced fatigue. Night and day..."
Star Rating 5
Staff response...
"Loving the detailed review Jimbo! Great to hear your process and importantly that the kit has hit the spot. Coil for the win! Ruth @TFT"
STAFF REVIEW
said...
"I was never too happy with the plushness of my Fox 36 Performance, compared to my Lyrik. Considering the upgrade alternatives (Zeb, 38, Boxxer), I thought it would be worth trying the Smashpot first. I have to say I'm absolutely amazed, it has transformed this product off the scale, and doesn't even resemble the feel of the original fork. The feeling of loading the front end up through rough corners knowing that it will hang on is addictive. The bottom out performance is sensational too - I was never very happy using air volume spacers to help bottom out, because it stores a lot of energy in your fork which you would prefer to dissipate. The fork is much more fun than it was before. I'm really surprised that the online reviews don't articulate how transformative this product is. Needless to say I'm delighted by this product and the great service from TF tuned. This is a great value alternative to upgrading to more expensive forks which probably don't perform as well as the Fox36 + Smashpot. Just to help others, I'm 70kg, on the 40lb/in 170mm. It's super plush, but doesn't bottom out (when compared to 65psi & 2 volume spacer in my Fox 36 which did bottom out on the same landings). I would be curious to try the 45lb/in spring, as the 40lb/in feels so supple, but I'm not bottoming, so I'll stick with what I've got for now."
Star Rating 5
Staff response...
"Really comprehensive stuff there Rowland. Thanks for taking the time to review the product in detail and your kind words about the team. Ruth @TFT"
said...
"Fast delivery, super product. Best thing to make your fork dreamy. Vorsprung spring recommendation was spot on, 55lb for 100kg rider. "
Star Rating 5
STAFF REVIEW
said...
"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"
said...
"Excellent service "
Star Rating 5
said...
"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
said...
"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
said...
"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
STAFF REVIEW
said...
"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"
said...
"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
said...
"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
said...
"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
said...
"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
STAFF REVIEW
said...
"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"
STAFF REVIEW
said...
"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"

Vorsprung Smashpot - Fork Coil Conversion System  

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