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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INJORA 22g Drive Shaft Steel Black Front Rear Center Shaft with D Shaped Hole for TRX4M Defender Bronco 1/18 RC Crawler Upgrade, 2PCS

INJORA 22g Drive Shaft Steel Black Front Rear Center Shaft with D Shaped Hole for TRX4M Defender Bronco 1/18 RC Crawler Upgrade, 2PCS

Product ID: 635181320

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🔩D-shaped & rounded rectangle holes for secure fit

⚙️Scale joint & spline diameter for realistic detail

🛠️22g hardened steel build

Description

⚙️ Upgrade your RC game with precision and power!

EASY UPGRADE - Direct fit for 1/18 TRX4M Defender Bronco models—no batteries or complex mods needed
BUILT TO LAST - Crafted from rust-resistant hardened steel for unmatched durability
PRECISION FIT - Innovative D-shaped and rounded rectangle holes ensure zero play and tighter transmission connection
LIGHTWEIGHT POWER - At just 22g, these shafts boost performance without weighing down your TRX4M Defender Bronco
AUTHENTIC SCALE DETAIL - Engineered spline diameter mimics real drive shafts for a true-to-life RC upgrade

INJORA’s 22g steel drive shafts are precision-engineered upgrades for the 1/18 TRX4M Defender Bronco RC crawler, featuring rust-resistant hardened steel, realistic scale joints, and innovative D-shaped holes for a tighter, more durable connection—delivering enhanced performance and authentic detail in every crawl.

Specifications

Educational Objective(s)	Construction Skills
Model Number	4M-50BK
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)	Steel
Colour	Black
Product Dimensions	2.54 x 2.54 x 5.08 cm; 30 g
Item model number	4M-50BK
Manufacturer recommended age	14 months and up
Manufacturer	INJORA
Country of Origin	USA
Item Weight	30 g

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