The Heavy Hitter Arctic XE Pro Swingarm Bolt 300M is a replacement swingarm bolt machined from 300M steel, a modified 4340 chromoly alloy, with a nitride hardened surface coating. Made by Heavy Hitter and sold here at GritShift, it ships with its nut, fits the Arctic Leopard XE Pro, XE Pro Enduro, S, R and MX and weighs 0.9 lb.
Specs verified October 2026 against the live GritShift product page.
Specifications
| Material | 300M steel (modified 4340 chromoly steel) |
|---|---|
| Surface treatment | Nitride hardened coating |
| Weight | 0.9 lb |
| Hardware | Nut included (bolt and nut) |
| Replaces | The OEM swingarm bolt on the Arctic Leopard XE Pro platform |
| Alloy background | The same high-strength alloy used in aerospace and motorsports |
| Built for | Hard landings, high-speed trails and repeated abuse where OEM hardware starts to show weakness |
What bikes does the Heavy Hitter 300M swingarm bolt fit?
- Arctic Leopard XE Pro
- Arctic Leopard XE Pro Enduro
- Arctic Leopard XE Pro S
- Arctic Leopard XE Pro R
- Arctic Leopard XE Pro MX
Why upgrade the XE Pro swingarm bolt to 300M?
Heavy Hitter machines this bolt from 300M, a modified 4340 chromoly steel, the same high-strength alloy used in aerospace and motorsports where failure is not an option. It is built for riders pushing the limits of the Arctic XE Pro, whether that is hard landings, high-speed trails or the repeated abuse where OEM hardware starts to show weakness. Heavy Hitter's own summary is that if you are upgrading power or suspension, or riding aggressively, the swingarm bolt is one of those small parts that matters.
What does the nitride hardened coating do?
The nitride hardening gives the bolt a hardened outer surface. Heavy Hitter specifies it for three reasons: increased wear resistance where the bolt bears in the swingarm and frame, reduced galling when the bolt is installed and removed, and long-term durability under the constant load a swingarm pivot carries every ride.
Which other 300M hardware does Heavy Hitter make for the XE Pro?
The swingarm bolt, supplied with its nut, covers one pivot. The rest of the rear suspension hardware on the XE Pro, the upper and lower shock bolts, the linkage bolts and the triangle pivot bolt, is covered by the separate Heavy Hitter Arctic XE Pro Linkage / Triangle / Shock Bolt Upgrade Kit 300M, machined from the same 300M steel with the same nitride hardening. Riders replacing the linkage or triangle at the same time can read the Arctic XE Pro Billet Racing Linkage specs and the Arctic XE Pro Billet Racing Triangle specs.
Where can I buy the Heavy Hitter Arctic XE Pro Swingarm Bolt 300M?
Right here. We sell the Heavy Hitter Arctic XE Pro Swingarm Bolt 300M at GritShift. Browse every Heavy Hitter part we carry in our Heavy Hitter collection.
