GP Suspension 20MM Cartridge System for 39MM Dyna
GP Suspension Cartridge kits include a spring set, specifically selected by a master setup technician based on the riding information you choose. Kits are built to order per your order specifications. Lead time is only about 4-5 days.
*Please leave your approx weight in the order notes at checkout. This is important information needed when building your specific kit.
- 39MM Dyna Models
“After ordering a Well-known brand name competitor’s product to fix our Dyna, we understood why riders aren’t buying cartridges for their Harleys; they’re cheap-o versions of their race kits that offer marginally better performance over stock with limited to no adjustment at a premium price. It was wasted money. When we sold the kit, we got a fraction of what we paid and laid it off on some poor sucker. So, we did what anyone with their own suspension manufacturing company would do: we adapted our Premium Championship Road Race cartridge “25” to our own Dyna. On our first test ride, we knew we were cooking. Fast forward one year and view the video of our Harley test rider at Chuckwalla raceway on his Dyna with GP Suspension forks and shocks. We found Zach sending it 10 miles from our facility on the world-famous Mullholland Highway on a stock Dyna and amazing (scaring) the hell out of us, but also almost crashing in every corner due to that typically horrible Harley Suspension. Zach has mad skills, but now with his Dyna on GP Suspension, he has the most performance and adjustability in any front fork kit product for a Dyna (or any cruiser type, for that matter).
We understand wanting to spend money first on a slightly faster ET and nice HP dyno chart, but that concept brings us back to one of our favorite classic cars: the 1987 Buick Grand National. The fastest production car of 1987 was a beast at local drag strips and street races. However, when that beast hit its first corner at the maddening speed it created in its engine bay, it also hit its first tree. See, the Grand National is hell in a straight line, but it handles horribly stock, a 1987 MR2 was better around the track and in the canyons. This is the typical Harley conundrum: slightly faster in a straight line and horrible at even minimum cornering, or awesome cornering and slightly slower off the showroom floor? We know what we’d do, and we did…we took videos of it and we took track times at our favorite road course with it. Then, we went hunting sport bikes with it and sent them packing too. All the while, we laughed and laughed at how fast we could ride this bike and how much fun it was to ride. Best money ever spent on our bikes, bar none. We guarantee you’ll agree on yours. Trust us with your ride. We won’t ever steer your wrong. If you don’t agree, send us the kit within 30 days and we’ll send you your very own numbered bills back along with an autographed picture of Ulysses S Grant.”