Silver Short Crank Arms: 140mm –160mm Introduction
2026-07-31
Silver Short Crank Arms: The Art of Pure Metal
Silver short crank arms are difficult to source because the modern short-crank market is dominated by black anodized finishes. Riders building titanium, steel, or classic-styled bikes are usually forced to choose between heavy, outdated square-taper budget alloy cranks and custom boutique options exceeding USD $500. The CRODER SPIRIT G2 Crank Arm in Silver covers 140–160mm in a full-CNC AL7075-T6 modular design, perfectly bridging that gap.
Ask any bike fitter and they will tell you short cranks have gone mainstream. 165mm is now common on production road bikes. 150mm is no longer exotic. The fit case is settled.
The finish case is not.
If you are building a raw titanium frame, restoring a classic steel bike, or simply want a build that stands out from the sea of matte-black machines, you quickly discover that short cranks come almost exclusively in black.
This guide covers market availability, key compatibility checks, and how to select the right length for your build.
New to short cranks? Start with our complete guide to short crank arms for the fit science, then come back here.
What's Actually Available in Silver
A scan of the current market sorts silver short cranks into three tiers — with a conspicuous hole in the middle.
Tier
Typical price
What you get
The catch
Budget alloy
~USD $90
Square-taper / 5-bolt alloy cranks (140mm+ in silver)
Modern 24mm axle, full CNC AL7075-T6, modular gearing
Historically almost non-existent
Custom / boutique
USD $525+
Machined-to-order arms, multi-finish options
Long lead times, high cost, bespoke chainline specs
The middle tier is where most riders belong: requiring a modern 24mm spindle interface, a versatile chainring range, and a pure metallic finish that complements the frame, without commissioning a custom part.
Who Actually Wants Silver Cranks?
This isn't only aesthetics. Four groups keep asking for it.
Titanium frame owners. Raw or brushed titanium reads as warm grey. Black cranks fight it; silver sits with it. This is the single largest group asking for silver components.
Steel restomods. A modern short crank on a classic steel frame is one of the best-value fit upgrades available — but a black anodised arm undoes the build's coherence instantly.
Silver Groupset Builds： Matching silver hubs, chainrings, and seatposts is impossible when forced onto a black crankset.
Light-Colored & Pastel Frames： Black cranks create a heavy visual anchor at the bottom bracket. Silver keeps the lines clean.
CRODER SPIRIT G2 Crank Arm — Silver
Specification
Detail
Finish
Silver
Lengths
140 / 145 / 150 / 155 / 160mm
Material
AL7075-T6 crank arms + SCM440 steel axle
Machining
Full CNC machined
Weight
371g per pair (155mm)
Q-Factor
150mm
Chainline
45.5mm
Axle
24mm SCM440
Crank bolt
8mm hex, 50–55Nm
Two things distinguish this from the budget tier.
Modular System: The SPIRIT ecosystem separates crank arms, axle, spider, and chainrings. Switching lengths only requires swapping arms, not replacing the entire crankset.
Modern Gearing Standards: Supports both BCD 110mm 4-arm spiders (46/30T, 48/32T, 50/34T, 52/36T) and Direct Mount 8-bolt chainrings (46/30T, 54/40T).
Choosing Your Length: 140 to 160mm
The silver range spans the genuinely short end. Here's how riders actually land on each.
140mm: Riders under ~155cm, junior racers, adaptive setups, riders with acute hip mobility restrictions, or triathletes seeking an ultra-compact aero position (exclusive to G2 alloy).
145mm: Riders ~155–162cm, or those experiencing hip crowding at top dead center on 150mm setups.
150mm: The most popular short length. Ideal for riders ~160–170cm seeking reduced hip impingement.
155mm: The modern baseline for riders ~168–175cm moving down from standard 170mm cranks.
160mm: The gateway length. A zero-risk transition for riders currently on 170mm or 172.5mm arms.
These are starting points, not prescriptions. Femur length, hip mobility and riding discipline all shift the answer. Use our crank length calculator guide to narrow it down before ordering.
Compatibility: Check These Three Things First
This is where most wrong orders happen. Read this section before you check out.
1. The axle is 24mm — and it is not interchangeable. SPIRIT G2 crank arms use a 24mm SCM440 steel axle. The SPIRIT Carbon Crank uses a 29mm (DUB) or 30mm axle. These are not compatible in either direction. If you're switching from Carbon arms to G2 silver arms, you need the G2 axle too.
2. Use the SCM440 steel axle only: The legacy 24mm aluminum axle is strictly for G1 products. G2 owners require the corrosion-resistant SCM440 steel axle.
Installation Notes
The crank bolt takes an 8mm hex at 50–55Nm — the spec is laser-marked on the arm itself, so you don't need to hunt for the manual mid-build.
Two things worth getting right:
Use a torque wrench. 50–55Nm is high enough that guessing by feel goes wrong in both directions. Under-torqued arms creak and eventually damage the interface; over-torqued arms are their own problem.
Re-check after the first ride. Standard practice on any new crank installation, and it takes thirty seconds.
Silver vs Black: Does the Finish Change Anything Functionally?
No. The finish is cosmetic — same AL7075-T6 alloy, same CNC process, same weight, same Q-factor, same chainring compatibility.
The one practical difference is that silver hides scuffs differently than black. Anodised black shows shoe rub as pale scratches; silver arms show wear far less visibly. On a crank arm — which takes heel contact and shoe rub throughout its life — this is a small but real advantage for anyone who keeps components for years.
Frequently Asked Questions
What lengths do silver SPIRIT G2 crank arms come in?
Silver is available in 140, 145, 150, 155 and 160mm, the short-crank range. The black G2 arms cover a wider span including140, 145, 150, 155, 160, 165, 167.5, 170 and 172.5mm.
Are silver crank arms heavier than black?
No. Finish does not meaningfully affect weight. SPIRIT G2 arms weigh 371g per pair at 155mm in either finish. If you need lighter, the carbon SPIRIT arms are 268g per pair, but they start at 145mm and cost considerably more.
Can I get 140mm crank arms in carbon?
No. The SPIRIT Carbon Crank Arm range starts at 145mm. 140mm is only available in the G2 aluminium arms — which is also the only way to get 140mm in silver.
Will silver G2 arms work with my existing SPIRIT crankset?
If you run SPIRIT G2, yes — the arms swap directly and your axle, spider and chainring carry over. If you run the SPIRIT Carbon Crank, no: the axle diameter and spider interface both differ.
What torque do SPIRIT G2 crank bolts need?
8mm hex, 50–55Nm. The specification is marked on the crank arm.
What's the Q-factor of the SPIRIT G2?
150mm. If that's too narrow for your hips, pedal extenders will widen your stance without changing the crankset.
Do short cranks reduce power?
Research on crank lengths from 145mm to 175mm has found statistically equivalent peak power output. Shorter cranks change cadence and hip angle, not your ceiling.
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Short cranks solved a fit problem the industry ignored for decades. Silver solves the one it created along the way — a market where every modern short crank arrives in the same black anodised finish, regardless of what frame it's going on.
If you're building titanium, restoring steel, or just want the bottom bracket area of your bike to look like it was planned rather than assembled, silver in 140–160mm is now an option that doesn't require a custom order.
