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SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0

SIRRIS | R38 | 2SC | ERide 3.0

$899.00
Rider Weight Range : Medium (140-180 lb) | Tune-CMS | Damper Adjust-2SC
  • Medium (140-180 lb) | Tune-CMS | Damper Adjust-2SC
  • Heavy (180-220 lb) | Tune-CMS | Damper Adjust-2SC
Big moto performance. Bombproof durability. 

The new Sirris R38 shock brings real big-bike suspension technology to compact e-motos, using proven internal architecture shared with the larger R46 platform and an oversized chassis built for serious abuse. While other shocks in this class fade, leak, and fail, this one is engineered to keep charging.

To accommodate the massive shock for smaller bikes, Sirris teamed up with Prickly to develop an R38 specific linkage (sold separately).  Engineered for precise fitment and optimized geometry, this custom linkage raises the rear of the bike by 25mm to accommodate the 289×78 Sirris R38 shock.

Note: the stock E-Ride Pro linkage WILL NOT WORK with the new R38 shock.

CMX fork drop clamp can be added to raise the front by an equivalent 25mm. 

Sirris offers two weight ranges to choose from when selecting your R38 shock for E-Ride Pro 3.0. (Listed weight ranges are rider weight without riding gear on. 15 pounds of riding gear is calculated into the weight ranges)

140 lbs - 180 lbs (Medium = 80 N/mm spring)
180 lbs - 220 lbs (Heavy = 90 N/mm spring)

PRODUCT SPECS:
Architecture

Piggyback, steel spring

Stroke

78 mm

Length

289 mm

Weight

3.3 lbs / 1.5 kg without spring

Adjusters
  • 2SC = Two Stage Compression (Independent high-speed and low-speed adjust)

    • Tool-free low-speed compression adjust, 18 clicks
    • High-speed compression adjust, 24 clicks (20mm hex)
    • Tool-free rebound adjust, 24 clicks
    • Spring preload adjust
Damping

R38 shares the same high-flow base valve cavity architecture as the larger R46. Massive oil flow delivers true moto-level damping feel, control, and consistency. Pro-level CMX (Compact Motocross Tune) damping with fully tunable compression and rebound circuits with high-flow internals that stay cool and consistent.

The result is exceptional pressure balance, faster frequency response, and a level of responsiveness normally reserved for full-size motocross suspension.

Tuned specifically for each bike model and designed to pair perfectly with Sirris F43 CMX forks, it delivers unmatched balance, traction, and confidence at speed.

Reservoir

Specifically designed around the large 16mm shaft and high oil displacement demands. The massive R46-spec internal floating piston system manages shaft displacement with precision, maintaining consistent damping feel under repeated hard hits and high heat loads.

Shaft

Same shaft as R46. Massive 16mm induction heat-treated hollow shaft with hard chrome finish — delivers extreme structural strength and huge oil flow through the main piston for true moto-level damping performance

Ø16 mm OD chrome-plated, induction hardened steel, hollow, Ø 5.5 mm ID

Shock body

A new smaller diameter body, spring, retainers, and hardware package reduce overall size while preserving the oversized internal flow characteristics that define the shock’s ride quality.

Seamless 6061 aluminum, type 3 hard anodized coating, ACME thread

Piston

The 38mm high-flow main piston uses true powersports architecture. Slightly smaller than the R46 piston but built with the same philosophy, it delivers massive tuning range and consistent damping performance far beyond anything in this category.

CNC 6061 billet aluminum, type 3 hard anodized coating

Piston band

Hard band

Spring retainer

Seamless 6061 aluminum, type 3 hard anodized coating, ACME thread, with locking feature, manual adjust

Body Cap

New upper body cap engineered for tighter chassis fitment without sacrificing internal oil flow performance.

Ultra-durable chrome plated, teflon-lined spherical bearings.

Lower Eyelet

New lower eyelet maintains maximum rebound oil flow to the shaft and metering rod while fitting smaller bike platforms.

Ultra-durable chrome plated, teflon-lined spherical bearings.

Bottom out

MCU bumper

Top out

Rubber bumper

Seals

HNBR

OWNER'S GUIDE:

2SC independent adjuster architecture is engineered to maximize sealing integrity, prevent oil bypass, & eliminate piston back-off under high loads.

Hard-Hit Capability Meets Unmatched Ride Feel

SIRRIS | CMX R38 | ERide PRO 3.0

Do I really need the Prickly linkage for this shock to work on my E-Ride Pro?

Yes. The stock linkage will not work because the shock is longer. The Prickly linkage was designed specifically for this new shock for E-Ride Pro SR and 3.0.

Do I need a drop clamp fork if I run the R38 with Prickly linkgage on my E-Ride Pro?

Type of riding, bike modifications, and rider preference will affect the choice to use a drop clamp or not.

All bikes with a 21” front wheel require a drop clamp for tire clearance.

Sirris has tested and tuned with a drop clamp on bikes with 19/18 wheels.

Sirris has not tested and tuned with 19/16 wheels. Our partner athletes racing with 19/16 wheels have been using drop clamps. Running a drop clamp with a 16 inch rear wheel will make the bike more stable at speed but may affect cornering.

Does this R38 shock have more travel than the stock shock or EXT Arma shock that fits E-Ride Pro SR and 3.0?

The rear wheel will have the same amount of travel as stock.The R38 has less travel but our engineers worked with Prickly to change the motion ratio of the rear suspension to keep the same wheel travel.

What is the difference between the R38 shocks for E-Ride Pro SR and 3.0 model?

Both models feature the same design and functionality, with the only differences being the spring rates and clicker settings. The 3.0 model is offered with 80 N/mm (Medium) and 90 N/mm (Heavy) springs, while the SR model is equipped with 90 N/mm (Medium) and 100 N/mm (Heavy) springs.

I bought a CMX fork awhile back, what do I need to know if I buy this new shock and linkage?

The only difference is clicker settings for compression and rebound on the fork.

The original CMX forks were tuned to work with EXT Arma shock, for E-Ride Pro SR and 3.0. You can see all of the clicker settings (new and old) in the OWNER’S GUIDES PDF download. This is under our SERVICE & TECH main navigation link, and also directly available on the SR and 3.0 product pages.

Type of riding, bike modifications, and rider preference will affect the choice to use a drop clamp or not.

All bikes with a 21” front wheel require a drop clamp for tire clearance.

Sirris has tested and tuned with a drop clamp on bikes with 19/18 wheels.

Sirris has not tested and tuned with 19/16 wheels. Our partner athletes racing with 19/16 wheels have been using drop clamps. Running a drop clamp with a 16 inch rear wheel will make the bike more stable at speed but may affect cornering.

I want to buy this new shock and linkage, and a new CMX fork - what do I need to know when I buy a new CMX fork for E-Ride Pro SR or 3.0?

The CMX forks are now updated with slightly different clicker settings to pair with the new R38 shock. Your fork and shock tune (Medium or Heavy) should match. The biggest question is whether to run the flat clamp or drop clamp version. The answer to that varies based on several factors including wheel size.

The R38 with the Prickly link raises the rear of the bike by 25mm. This increases ground clearance under the bike and tire clearance under the seat, two known issues with the stock bike. Raising the rear of the bike without changing anything in the front will affect the geometry and stance.

Type of riding, bike modifications, and rider preference will affect the choice to use a drop clamp or not.

All bikes with a 21” front wheel require a drop clamp for tire clearance.

Sirris has tested and tuned with a drop clamp on bikes with 19/18 wheels.

Sirris has not tested and tuned with 19/16 wheels. Our partner athletes racing with 19/16 wheels have been using drop clamps. Running a drop clamp with a 16 inch rear wheel will make the bike more stable at speed but may affect cornering.

If you decide to run a flat clamp now and want to use a drop clamp in the future, the install process is easy.

Does this shock and linkage fit on the E-Ride Pro ok, and do I need to do any frame modifications?

No frame modifications are needed, this is a bolt-on direct fit solution. You must use the Prickly linkage with the R38, the stock E-Ride Pro linkage will not work with the R38.

I have the new long seat version of E-Ride Pro, what modifications are needed?

You need to cut roughly a 3” x 3” window in the plastic piece that goes under the seat to allow room for the R38 reservoir.

Does this new shock and linkage affect bike geometry and stance?

Yes. It raises the rear 25mm. This increases ground clearance under the bike and tire clearance under the seat, two known issues with the stock bike. Raising the rear of the bike without changing anything in the front will affect the geometry and stance. Depending on type of riding, bike modifications, and rider preference you may want to use a drop clamp.

All bikes with a 21” front wheel require a drop clamp for tire clearance.

Sirris has tested and tuned with a drop clamp on bikes with 19/18 wheels.

Sirris has not tested and tuned with 19/16 wheels. Our partner athletes racing with 19/16 wheels have been using drop clamps. Running a drop clamp with a 16 inch rear wheel will make the bike more stable at speed but may affect cornering.

Can I buy the Prickly linkage directly from Prickly or dealers?

Yes. Feel free to contact Prickly or you can purchase the Prickly Linkage here at Tradewind Detour!

SIRRIS Warranty

LIMITED WARRANTY INFO

Your Sirris fork and shock are warrantied against manufacturing defects for a period of 2 years. Normal wear and regular maintenance are not covered.

Sirris makes the following LIMITED WARRANTY with respect to its suspension products:

LIMITED TWO (2) YEAR WARRANTY ON SUSPENSION PRODUCTS

Subject to the limitations, terms and conditions hereof, Sirris warrants, to the original retail owner (consumer) of each new Sirris suspension product, that the Sirris suspension product, when new, is free from defects in materials and workmanship. This limited warranty expires two (2) years from the date of the original Sirris suspension product retail purchase from an authorized Sirris dealer or from a Sirris authorized Original Equipment Manufacturer where Sirris suspension is included as original equipment on a purchased vehicle.

TERMS OF WARRANTY

This limited warranty is conditioned on the Sirris suspension product being operated under normal conditions and properly maintained as specified by Sirris. This limited warranty is only applicable to Sirris suspension purchased new from an authorized Sirris source and is made only to the original retail owner (consumer) of the new Sirris suspension product and is not transferable to subsequent owners.

Should it be determined, by Sirris in its sole and final discretion, that a Sirris suspension product is covered by this limited warranty, it will be repaired or replaced, by a comparable model, at Sirris’s sole option, which will be conclusive and binding. THIS IS THE EXCLUSIVE REMEDY UNDER THIS LIMITED WARRANTY. ANY AND ALL OTHER REMEDIES AND DAMAGES THAT MAY OTHERWISE BE APPLICABLE UNDER THIS LIMITED WARRANTY ARE EXCLUDED, INCLUDING, BUT NOT LIMITED TO, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR PUNITIVE DAMAGES.

This limited warranty does not apply to normal wear and tear, malfunctions or failures that result from abuse, neglect, improper assembly, alteration or modification, improper or unauthorized repair or maintenance, crash, accident or collision, or other abnormal, excessive or improper use.

THIS IS THE ONLY WARRANTY MADE BY SIRRIS ON ITS SUSPENSION PRODUCTS AND COMPONENTS, AND THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION HEREIN. ANY WARRANTIES THAT MAY OTHERWISE BE IMPLIED BY LAW INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXCLUDED.

For questions regarding this warranty or Sirris products please email info@ridesirris.com, or visiting www.ridesirris.com.

When making a claim under this Limited Warranty you will be required to provide to an authorized Sirris Service Center:

1. The Product (or the affected part) and

2. A copy of the original proof of purchase, which clearly indicates the name and address of the seller, the date and place of purchase, the product part number and if utilized, a serial number. If Sirris products are sold as part of a complete motorcycle, the motorcycle brand, model, model year, and serial number should be included.

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SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
SIRRIS | R38 | 2SC | ERide 3.0
$899.00
Rider Weight Range : Medium (140-180 lb) | Tune-CMS | Damper Adjust-2SC
  • Medium (140-180 lb) | Tune-CMS | Damper Adjust-2SC
  • Heavy (180-220 lb) | Tune-CMS | Damper Adjust-2SC
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