Box Two Vector M30-P Cranks (2025 Review)

Here’s my full, in-depth look at the Box Two Vector M30-P cranks.

Let’s dive in and see if they live up to the hype.

These cranks are all about one thing: getting more of your pedal power to the rear wheel.

Box obsessed over how stiff they could make their spindle and arms.

They blew up the spindle to 30mm (!) and beefed up the arm interfaces.

This is NO JOKE!

Then they shaved away material where it wasn’t needed.

The result is a BMX racing crankset you can really lean on when you’re sprinting and popping big moves.

In short, if you want to take your track life to the absolute next level, you’ll benefit from these cranks tremendously.

You’ll notice how quick your bike feels off the line, and how little effort it takes to hit the same speed you used to struggle with.

Are you ready?

Box Two Vector M30-P BMX Racing Cranks Review

1. Key Features Of The Box Two Vector M30-P Cranks

• Oversized technology: Enlarged spindle and arm interfaces for rock-solid pedaling stiffness.
• Hollow forged design: Crank arms poached from the Box One M35 model. Hollow-forged to shed weight and boost strength.
• Large 30mm alloy spindle: Praxis M30 cold-forged from 7075 T-6 aluminum. Precision-ground for tight tolerances.
• Self-extracting crank bolt system: Chromoly and alloy hardware makes install and removal a breeze. (Even if you’re not into bike assembly, you’ll still enjoy it!)
• Spider with flex-resistant ring: Keeps your 4-bolt 104 BCD chainring locked in place under heavy loads.
• Bottom bracket included: Comes with a BSA 30 mm, 1.37″ English threaded BB – ready to fit most Euro shells.

These features work together to cut flex under load.

Less lateral “wobble” means you waste less effort.

You push, the bike moves.

It’s THAT simple.

2. Box Two Vector M30-P Cranks Specifications

Material & Finish

• Arms: 7075 T-6 aluminum, hollow-forged & CNC
• Spindle: 7075 T-6 aluminum, cold-forged & CNC turned
• Finish: anodized with laser-etched graphics

Dimensions & Fit

• Chainline: 44.5mm
• Q-Factor: 163mm
• Spindle size: 30mm (included)
• Bottom bracket: BSA30 mm, 1.37″ English (included)
• Chainring compatibility: 4-bolt, 104 BCD

Weights

• 172.5mm: 28.2 oz (800 g)
• 175mm: 28.6 oz (810 g)
• 177.5mm: 28.9 oz (820 g)
• 180mm: 29.3 oz (830 g)

Note: ±10% variation possible due to hollow-forged process

Process Overview

• Hollow forging of arms for strength-to-weight.
• Precision CNC machining to dial in exact shape.
• Praxis cold-forge the spindle, then grind to finish.
• Anodize and add laser-etch for visuals.

Size-By-Size Breakdown

3. How The Box Two Vector M30-P Cranks Feel/Ride

You’ll notice the difference right away.

There’s almost no side-to-side flex at the BB.

Stand up and mash.

The bike lunges forward instantly and you’ll feel every watt go straight into momentum.

And that’s precisely what you’d expect from a top-tier crankset like this.

• Sprint response is sharper.
• Small inputs translate to speed. You don’t have to slam the pedals just to keep up.
• Big moves feel locked-in. No surprises mid-air.
• Climbing gets easier. Less wasted leg work.
• Corner exit is snappier. You feed the pedals power, and the rear wheel hooks up.

The self-extracting bolt system means you can swap cranks at the track in no time.

No annoying fishing for pullers.

And because the arms share hollow-forged DNA with the Box One M35, you get a supple but stout feel underfoot – plenty of strength, but never harsh.

Note: Check out the INSIGHT RLC crankset if you’re searching for more affordable cranks.

4. Real Rider Feedback

• Alex M.: “On gate starts, these cranks lock up power like nothing else. My launches are sharper and more consistent race after race.”
• Casey I.: “I shaved tenths off my lap times thanks to the stiffness. No more wasted pedal strokes in the straights.”
• Jordan D.: “Track cornering feels bulletproof. I can lean hard and still feed the pedals through the berms without any flex.”
• Taylor B.: “During sprint workouts, the instant response is unreal. You feel every watt translate immediately to forward motion.”
• Riley C.: “I race 1/2 mile and time trial. These cranks give me the edge when it matters – zero play, zero surprises.”

5. Potential Cons Of The Box Two Vector M30-P Cranks

• Price is on the higher side. You pay for top-tier stiffness and build.
• Limited color options. No color options if you want a splash of style.
• Q-Factor (163 mm) may feel wide to narrow-stance riders.
• Weight variance ±10 % means some arms might edge above 900 g.

6. Who The Box Two Vector M30-P Cranks Are Best For

• Power riders & racers who need every bit of stiffness for sprints and gate starts.
• Larger-framed racers used to Box One M35 but seeking a lighter spindle.
• Euro BB shell owners who want a perfect fit with no extra bearings.
• Anyone chasing efficiency when climbing or cornering.
• Riders who swap lengths often and need quick, reliable installs.

Conclusion: Should You Get The Box Two Vector M30-P Cranks?

If you’re serious about winning races, every watt counts.

The Vector M30-P cranks refuse to let you waste energy.

You mash the pedals and the bike surges forward – no side flex, no lost power.

That instant response feels like a secret weapon off the gate, down the straights, and through the corners.

You’ll know exactly what I’m talking about on your first crank after installing these.

You’ll finish your heats fresher, lap after lap.

You’ll notice the split-second advantage at the start gate, the tighter exit out of turn one, and the boost when you dive into the final sprint.

To keep it simple: These cranks are a performance upgrade that rewards every push.

Sure, they cost more than entry-level sets.

But think of it this way: you invest in speed, consistency, and confidence.

You invest in equipment that lets you focus on riding and WINNING, not on wondering if your cranks can handle your (incredible!) power.

If you’re chasing podiums, refining lap times, or simply want to feel the full impact of your effort, don’t settle for anything less.

Grab the Box Two Vector M30-P cranks and put your power where it belongs – INTO MOTION.

Ride faster. Race better. Own your track.

For more BMX race bike upgrades, consider these:

• Answer Dagger carbon fork
• HT X2-SX clipless BMX pedals
• S&M Race XLT bars
• S&M Race XLT stem