Rear suspension parts aren't a grab-and-go purchase. You might be after a replacement shock, a ride-height change, or a spring that matches a specific snowmobile. The four parts here show how wide that range is: from a $37.75 Ski-Doo spring to a $135.45 gas shock assembly. The right choice has more to do with your machine and the suspension job you're tackling than with price alone.
Quick take: If you want a shock assembly instead of just a spring or link, the SPI gas shock is the shock assembly option. If you want to lower a motorcycle's ride height, the adjustable drop link kit handles that geometry work. If you're seeking a universal pair for an ATV, go-kart, or motorcycle, the air shock pair is the only two-shock set in this group. And if you own the 2012-2014 Ski-Doo Summit Sport Power TEK 800R, the SPI Spring-Right is the model-specific spring part.
| Product | Listed Price | Price Bar | Key Differentiator |
|---|---|---|---|
| SPI Rear Suspension Gas Shock Assembly SU-04323 | USD 135.45 | Aftermarket gas shock that works with OEM bushings, springs, and collars | |
| 1 pair 330mm Adjustable Rear Air Shock Absorbers Suspension Powersports Parts | USD 96.12 | Universal-fit rear shock pair for ATV, go-kart, or motorcycle | |
| Rear Suspension Lowering Links Kit Motorcycle Drop Link Adjustable | USD 66.08 | Adjustable lowering links identified with GSXR600 fitment | |
| SPI Suspension Spring-Right for 2012-2014 Ski-Doo Summit Sport Power TEK 800R | USD 37.75 | Model-specific suspension spring for a Ski-Doo Summit Sport |
Decision matrix: Need a complete shock assembly? Choose the SPI gas shock. Need to alter ride height? Choose the drop link kit. Need a pair that lists ATV, go-kart, and motorcycle fitment? Choose the air shock pair. Need a targeted spring for the Ski-Doo Summit Sport? Choose the SPI Spring-Right.
SPI Rear Suspension Gas Shock Assembly SU-04323
If your rear shock absorber needs replacing but the bushings, springs, and collars are still in good shape, this SPI assembly is the one to look at. The product description says it's designed to work with OEM bushings, springs, and collars, so you're swapping in the shock portion rather than a full spring-over-shock unit. It's listed as a new performance/aftermarket part, with the SPI brand and part number SU-04323 identifying the assembly. The trade-off: you need to reuse your existing hardware and it doesn't include those components.
Rear Suspension Lowering Links Kit Motorcycle Drop Link Adjustable
This is the part to consider when the goal is lowering the rear of a motorcycle rather than swapping out a shock. The kit comes as a package quantity of two links and carries the model identifier 'GSXR600 drop links.' The description positions it as adjustable and easy to install, with the benefit of a lower ride height. The limitation is that links change geometry, not damping: you won't get new spring or shock performance from this part. Also, the model-specific identifier situates it with GSXR600 fitment, even though the title is broadly worded.
1 pair 330mm Adjustable Rear Air Shock Absorbers Suspension Powersports Parts
If you're outfitting an ATV, go-kart, or motorcycle and want a pair of rear shocks, this set is the one that lists multiple vehicle types. The 330mm extended length is stated in the title, and the description points to a high-carbon steel spring plus hydraulic damper for absorbing road impact. It includes mounting brackets, bolts, and multi-language instructions, which is a plus for DIY installation. The limitation is that 'universal fit' still means the mounting points and length have to match your machine; the listed compatibility covers ATV, Go Kart, and Motorcycle, but not every model within those categories.
SPI Suspension Spring-Right for 2012-2014 Ski-Doo Summit Sport Power TEK 800R
This one is the most straightforward fitment story: it's a suspension spring for the 2012-2014 Ski-Doo Summit Sport Power TEK 800R. If you own that sled, the SPI Spring-Right is a targeted replacement option, and the manufacturer part number 4318-S336477-88 gives you a specific reference. The limitation is that it's a spring, not a shock assembly, so you're only addressing the spring portion of the rear suspension. And because it's model-specific, it won't be the right part for a different year or trim.
Final recommendation by use case:
- Choose the SPI gas shock assembly if the shock is the component you need to replace.
- Choose the lowering links kit if you want to adjust a motorcycle's ride height.
- Choose the air shock pair if you need a universal-fit pair for an ATV, go-kart, or motorcycle.
- Choose the SPI Spring-Right if your sled matches the stated Ski-Doo Summit Sport fitment.
