A foundry pouring molten metal with a Matrix 2 truck in the foreground

What's this then? Well, it's a simple solution to the difficulty of adjusting the Matrix II: rather than adjusting the shock blocks by pushing them up, Leon designed a plate that could be adjusted down from the top truck. As the plate compresses the shock blocks, they stay in position because they sit squarely on the bottom truck and can’t move around. Interested? A few of these kits have been made, and if you'd like to get a set for yourself, get in touch with Leon. Each set is comprised of 2 Mod Plates and 4 preload bolts, enough for one board. Costs: - £24.99 for the Mod Plates + 4 preload bolts - UK postage: from £2.70 (signed for) - EU postage from £8.35 (track & sign) - Rest of World from £8.95 (track & sign) Get in touch with Leon directly: - by email at comp16pro@gmail com - on Instagram at https://www.instagram.com/rhythmcross/ - on Facebook at https://www.facebook.com/Rhythmcross

Fitting Instructions

  1. Remove the shock blocks and bottom preload bolts

  2. Remove the MBS plate that is bolted to the Top Truck. You will need a 5mm Hex Key. The bolts have thread lock on them so you may need to apply a fair amount of force.

    The MBS top plate
  3. Make sure that the top preload bolts holes in the deck, the riser pad (if fitted) and the Top Truck are in line.

  4. Insert the top preload bolts through the deck and turn clockwise to engage the thread in the Top Truck. Keep turning the bolts clockwise (use a 4mm Hex Key) until you can see the threaded section of the bolts appear out of the underside of the Top Truck. If the bolts do not turn freely, see Step 3.

  5. Turn the top preload bolts anti-clockwise until around 2mm of the bolt end is visible out of the underside of the Top Truck.

  6. Re-insert one of the bottom preload bolts enough to fit a shock block.

  7. Insert the Mod Plate, make sure that the protruding ends of the top preload bolts sit in the recess holes in the Mod Plate.

  8. Holding the Mod Plate in place by hand, fit a shock block to the bottom pre load bolt.

  9. Insert the other shock block and bottom pre load bolt.

  10. Check that the Mod Plate is located properly then wind the lower pre-load bolts in until the shock blocks are properly seated but not lifted away from the truck.

  11. Adjust the Mod Plate by turning the top preload bolts clockwise to stiffen your steering or counter clockwise to loosen. It is very important to adjust the top preload bolts evenly so that the Mod Plate stays horizontal in relation to the Top Truck.


  • When using the loosest setting make sure that top preload bolts are still in contact with the Mod Plate in their recess holes.

  • Leon recommends a maximum compression of 5mm between the Top Truck and the Mod Plate.

  • Do not over compress your Shock Blocs, if they can’t stiffen your steering to the desired level, insert stiffer shock blocks or replace worn/compressed shock blocks with new ones. If you have the Matrix II’s with the plastic Top Truck, you can replace the Top Truck with an alloy one from the Matrix I Pro trucks, then fit the Mod Plates. The fitting instructions are the same with the exception that there is no MBS plate to remove.

  • This is a peer to peer project, the aim is not to get rich but to innovate, doing our bit to help push the sport forward, your feedback is key to that process

Important: The Mod Plate is designed to work by adjusting the top preload bolts only, do not use the bottom preload bolts to make any adjustments.

The full story behind this project

Because some of you will want more information, we asked Leon a few questions!

Surfing DirtLeon, can you explain what your modification is and why you made it?
LeonYeah of course, with the exception of my first board (a Mongoose Unicamb) I’ve always ridden MBS channel trucks. MBS kept tweaking the design over the years, making improvements, always producing something that kept them ahead of their rivals. However because of my background in motor cycle mechanics I always thought it was odd to use a spring without any form of rebound dampening and that’s why in 2010 I decided on a bit of an experiment, to run my Matrix Pro’s without any springs. To my surprise it worked incredibly well for me and quite a few other riders.
Surfing DirtSo why do you think it didn’t catch on?
LeonI think it was a combination of disbelief in the wider mountainboard community that you didn’t need the springs that we had all become accustomed to, plus the extra stress it put on the egg shocks meant the design wasn’t as bullet-proof as the standard design. The trade off in performance against durability was not something the majority of riders wanted to make. That being said, I and many others rode that design trouble-free right up until MBS released the Matrix II.
Surfing DirtWhy did you swap that set up for the Matrix II ?
LeonI had always wanted to take my initial idea further but I was put off by the expense of creating my own truck from scratch, when MBS released the Matrix II I was really pleased that it looked very close to the design that had been floating around my head since 2010.
Surfing DirtIf you like new design so much, why have you felt the need to modify it?
LeonWell, I pretty much like everything about the Matrix II, the turning is so much more progressive and responsive than any other truck I’ve ridden before plus it’s lighter and the shape of the lower truck is so much better for rails, copings and ground clearance. The one thing I didn’t like was its preload system, after a certain point the more I tried to stiffen the steering, the looser it got. On closer inspection, I could see this was because the shock blocks were lifted away from the lower truck to such a degree that they started pivoting on the preload bolts, this allowed them to slide off the top plate rather than compress up against it.
Surfing DirtGoing back to our first question, what is your modification and how does it work?
LeonIt’s a pretty simple solution, rather than adjusting the shock blocks by moving them up, I designed a plate that could be adjusted down from the Top Truck. As the plate compress the shock blocks they stay in position because they sit squarely on the bottom truck and can’t move around.