Are these version 2? Same as chrome ones.

Yes they the same, I have both sets so, I can confirm that they're the same

Whould these fit fms fcx or furitek caymen? Thanks

They are for 1:18 scale crawlers, but they're only a few bucks, so try em out. You could probably cross reference sizes though to find out for sure. I know the hole to attach the shaft is a d-shaped hole.

Any idea if these will work with the K10 High Trail?

I use them on my K10 Monster Truck build with 59mm INJORA shocks. It's at their limit, but functional. I think INJORA just came out with a stainless steel version, specifically for the K10, on their website.

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INJORADrive Shaft Steel Black Front Rear Center Shaft with D Shaped Hole for TRX4M Defender Bronco 1/18 RC Crawler Upgrade, 2PCS

INJORADrive Shaft Steel Black Front Rear Center Shaft with D Shaped Hole for TRX4M Defender Bronco 1/18 RC Crawler Upgrade, 2PCS

Product ID: 534301205

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🔩Scale-accurate spline diameter for realism

⚙️Precision D-shaped hole for secure fit

🛠️Hardened steel for max durability

Description

⚙️ Upgrade your RC game with precision and power!

UNMATCHED DURABILITY - Crafted from hardened steel to resist rust and wear, ensuring your RC crawler keeps conquering.
SEAMLESS COMPATIBILITY - Perfectly tailored for TRX4M Bronco and Defender stock and INJORA gears—upgrade without compromise.
EFFORTLESS INSTALLATION - Lightweight 30g design with easy assembly means you’re back on the trail faster than ever.
AUTHENTIC SCALE DETAILING - Spline diameter and joint sizes mirror real parts for a true-to-life upgrade that stands out.
PRECISION FIT ENGINEERING - D-shaped and rounded rectangle holes guarantee a tighter, wobble-free connection to transmission and axles.

The INJORADrive Shaft Steel Black Front Rear Center Shaft set offers a high-quality, rust-resistant steel upgrade for 1/18 scale TRX4M Defender and Bronco RC crawlers. Featuring precision-engineered D-shaped holes and scale-accurate spline diameters, these shafts ensure a secure fit and authentic appearance, enhancing both durability and realism for serious hobbyists.

Specifications

Product Dimensions	2.54 x 2.54 x 5.08 cm; 30 g
Item model number	4M-50BK
Educational Objective(s)	Develop manual skills and understanding of mechanical components
Number of Game Players	1
Assembly Required	Yes
Batteries Required?	No
Batteries included?	No
tech_spec_battery_description_toys	No batteries required
Material Type(s)	Metal
Colour	Silver
ASIN	B0C7GQ6MFL

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