Sirris R46 2SC Shock for Surron Ultra Bee - Trail Tune (V1.2)

The Sirris R46 2SC Trail Tune shock brings more adjustability and control to the Surron Ultra Bee. Updated with Two Stage Compression (2SC), refined Trail Tune damping, a revised bottom-out bumper, and new graphics, it delivers a sporty, supportive feel for aggressive trail riding.

We love the trail tune here at ECR. It's plush enough for moderate trail riding but with some clicker adjustments, can also handle light MX or fast flow trails. 

Trail Tune is designed for riders who want to go fast across a wide variety of terrain. High-flow internals and fully tunable compression and rebound circuits help maintain consistent damping through repeated hits, while independent high-speed and low-speed compression adjustments let you dial in support and impact absorption separately.

Designed specifically for the Ultra Bee and developed to pair with the Sirris F43 fork, the R46 installs as a direct replacement for the stock shock.

Note: This listing is for the Trail Tune Shock. If you are a Motocross Rider, please see the Sirris R46 MX Tune Shock here.

Want to see all of the Sirris Fork & Shock Options? Click here every Sirris Suspension tune we sell.

Key Features

• Independent compression adjustment: The 2SC system provides separate high-speed and low-speed compression adjustments for greater control over suspension feel.

• Updated Trail Tune: Versatile, sporty, and supportive damping designed for aggressive riding across varied terrain.

• High-flow damping: A high-flow base valve cavity and 46 mm main piston provide a broad tuning range, responsive damping, and consistent performance.

• Rider-matched spring options: Six spring rates let you select the setup for your weight.

• Durable construction: A Type 3 hard anodized aluminum body and 16 mm induction-hardened, chrome-plated hollow steel shaft are built for demanding riding.

• Large floating piston reservoir: Designed to manage the oil displacement of the 16 mm shaft and maintain consistent damping through repeated hard hits and high heat loads.

• Fully serviceable: Rebuildable construction with compression and rebound valving that can be custom tuned.

• Direct fit: Stock replacement dimensions of 320 mm length and 85 mm stroke, with no additional parts or modifications required.

Rider Weight and Spring Selection

Select your spring based on rider weight without riding gear. Sirris already accounts for 15 lbs of riding gear in the ranges below.

Rider Weight Without Gear	Spring Option	Spring Rate
Under 160 lbs	Light	75 N/mm
160–200 lbs	Medium	85 N/mm
200–230 lbs	Heavy	95 N/mm
230–260 lbs	X Heavy	105 N/mm
260–290 lbs	XX Heavy	115 N/mm
Over 290 lbs	XXX Heavy	125 N/mm

External Adjustments

• Low-speed compression: 18 clicks

• High-speed compression: 24 clicks, adjusted with a 20 mm hex

• Rebound: 24 clicks

• Spring preload: Manually adjustable threaded retainer with locking feature

Specs

R46 2SC Trail Tune Specifications

Specification	Details
Fitment	Surron Ultra Bee
Tune	Trail Tune
Architecture	Piggyback shock with steel coil spring
Length	320 mm
Stroke	85 mm
Weight Without Spring	3.9 lbs / 1.76 kg
Compression Adjustment	2SC with independent high-speed and low-speed adjustment
Damping	High-flow internals with fully tunable compression and rebound circuits
Main Piston	High-flow 46 mm CNC-machined 6061 billet aluminum, Type 3 hard anodized
Piston Band	Hard band
Shaft	16 mm OD induction-hardened, chrome-plated hollow steel; 5.5 mm ID
Shock Body	Seamless 6061 aluminum, Type 3 hard anodized, ACME thread
Spring Retainer	Seamless 6061 aluminum, Type 3 hard anodized, ACME thread, manually adjustable with locking feature
Reservoir	Pressurized internal floating piston system
Bottom-Out Bumper	Updated MCU bumper
Top-Out Bumper	Rubber bumper
Seals	NBR

Pair It with the Sirris F43 Fork

Complete your Ultra Bee suspension setup with the Sirris F43 fork. With 246 mm of travel and purpose-tuned damping, the F43 is designed to work alongside the R46 for balanced handling, traction, and control.

Fitment

• Surron Ultra Bee

(Direct replacement for the stock shock with no modifications or additional parts required.)