Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®

Grind 431™ V2 LCG OD Transmission

Key Features

  1. 69g total weight with skid
  2. All-new hyper lightened & hardened custom chromoly gears
  3. 31% sweet spot overdrive
  4. Carefully engineered gear ratios as always
  5. 2.5mm Toray® premium high-grade graphite motorplate
  6. Ultra light high-tech nylon polymer housing
  7. Custom stainless steel shafts
  8. High-performance & durable bearings
  9. Dedicated 6º re-angled & straight skid options
  10. All-made in Europe
Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®

Champion Proven Performance

The amazing performance of the Grind 431™ LCG OD Transmission has been tested and proven for 6 months by PROCRAWLER® Factory Driver Massimo “Max” Bonvini.

Max’s Featured Track Records:

  • WRCCA Italia 2021 Performance Scale Champion
  • EuroCrawl 2019 Scaler Extreme Champion
  • 3x CISE Scaler Extreme Champion
  • Moab Extreme Challenge Champion
  • 4x Lombardy Regional SORRCA Champion
  • 5x Piemonte Regional SORRCA Champion

69g Total Weight With Skid

Insanely light. The 48g net weight and 69g total weight with skid makes the Grind™ 431 V2 LCG OD Transmission the lightest ever in its class.

Net weight48g
Net weight /w skid69g
Housing height /wo insert hub31mm
Motorplate height35mm

The V1 version already was super light but we aimed to get the most out of the V2. You better believe the result even shocked ourselves.

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Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®
Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®

All-New Hyper Lightened & Hardened Custom Chromoly Gears

The all-new generation of Grind™ ODT gears take it to a whole new level: we lightened their design as much as possible and thanks the pinned mounting they are way narrower than former generation ones.

The Grind™ 431 V2 gears are still super hardened and made of ultra strong and durable chromoly material while the M0.5 modulus teeth ensure ultra smooth running.

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31% Sweet Spot Overdrive

We @Team PROCRAWLER® spent tons of wheel hours on the rocks putting our rigs in work and found 31% as the sweet spot when it comes to overdrive rate.

That’s why we designed also the Grind™ 431 V2 LCG OD Transmission around this magical value and implemented 31% overdrive in it.

Get Yours Today ➝

Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®
Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®

Carefully Engineered Gear Ratios As Always

Gear ratios must be carefully engineered to properly serve the purpose of use. We have spent months with doing the maths homework and defined the gearing of the Grind™ 431 V2 LCG OD Transmission to perfectly fit the needs of pro scale rock crawling.

Front Transmission Output Ratio1.83:1
Rear Transmission Output Ratio2.50:1
Find all gear ratio datas with final drive by axle types in the Tech Specs section below.

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2.5mm Toray® Premium High-Grade Graphite Motorplate

When we compiled the product features list of the Grind 431™ V2 LCG OD Transmission it was not a question to use the ultimate Toray® premium high-grade graphite material for the motormount plate.

Toray® premium high-grade graphite, this high-end quality carbon is ultra light but still super strong as we already experienced at our chassis rails, all in all the perfect motorplate material.

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Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®
Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®

Ultra Light High-Tech Nylon Polymer Housing

Crafting the lightest but still powerful LCG OD transmission in its class requires careful engineering when it comes to materials.

That’s why we decided to use the super light and rock solid PA12 high-tech nylon polymer paired with the high-end SLS (Selective Laser Sintering) 3D printing technology for the housing of the Grind 431™ V2 LCG OD Transmission with metal inserts for long lasting threads.

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Custom Stainless Steel Shafts

Smooth running depends on several elements of a competition level LCG transmission. One of them are the properly designed and manufactured shafts.

We engineered the perfect custom stainless steel shafts for the Grind 431™ V2 LCG OD Transmission to support its butter smooth running on a long term basis.

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Flatgekko™ Grind 431™ LCG OD Transmission by PROCRAWLER®
Flatgekko™ Grind 431™ LCG OD Transmission by PROCRAWLER®

High-Performance & Durable Bearings

We have looked into and tested dozens of bearings until we found the perfect ones for the Grind 431™ V2 LCG OD Transmission.

The high-performance and durable oiled Grind 431™ V2 stainless steel bearings run smooth like a breath of fresh air but are resistant to dust and mud.

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Dedicated 6º Re-Angled & Straight Skid Options

The Grind™ 431 V2 LCG OD Transmission is a seamless fit for the Flatgekko™ C23 V2R, C1 V1, the Yuuki™ FS1 V1 and the Madstockr SCX10II/Enduro LCG chassis systems for sure but was designed to also fit any chassis rails no matter if having angled or straight skid.

That’s why the Grind™ 431 V2 is available with dedicated 6º re-angled and straight skid options.

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Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®
PROCRAWLER® Grind™ 431 V2 LCG OD Transmission

Made In Europe

The Grind 431™ V2 LCG OD Transmission is designed in-house by the engineering artists of Team PROCRAWLER® in Hungary/Europe.

High-quality production is processed on state-of-the-art Hungarian and Italian 3D printers and CNC machines so the Grind 431™ is crafted of the finest that the EU has.

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Tech Specs

Grind 431™ V2 Dimensions
Length: 14.5mm
Width: 87mm
Housing height /wo insert hub: 31mm
Motorplate height: 35mm
Bearings size: 5x10x4mm flanged
Shaft diameter: 5mm
Grind 431™ V2 Weight
Net weight: 48g
Net weight /w skid: 69g

Grind 431™ V2 Overdrive
31% Front Overdrive

Grind 431™ V2 Front Transmission Output Ratio
1.83:1

Grind 431™ V2 Rear Transmission Output Ratio
2.50:1

Grind 431™ V2 Front Transmission Output Ratio /w Final Drive
11.40:1 /w 9T/56T Pinion/Spur
7.90:1 /w 13T/56T Pinion/Spur
6.04:1 /w 17T/56T Pinion/Spur

Grind 431™ V2 Rear Transmission Output Ratio /w Final Drive
15.55:1 /w 9T/56T Pinion/Spur
10.77:1 /w 13T/56T Pinion/Spur
8.24:1 /w 17T/56T Pinion/Spur

Grind 431™ V2 Front Drive Ratio
42.78:1 /w 9T/56T Pinion/Spur + AR44/AR45/Enduro Axles Or Clone
46.79:1 /w 13T/56T Pinion/Spur + AR45P/Capra/F10 Axles Or Clone
42.93:1 /w 17T/56T Pinion/Spur + TRX-4 Axles Or Clone

Grind 431™ V2 Rear Drive Ratio
58.33:1 /w 9T/56T Pinion/Spur + AR44/AR45/Enduro Axles Or Clone
63.80:1 /w 13T/56T Pinion/Spur + AR45P/Capra/F10 Axles Or Clone
58.55:1 /w 17T/56T Pinion/Spur + TRX-4 Axles Or Clone

Grind 431™ V2 Materials
PA12 housing 3D printed by SLS (Selective Laser Sintering)
2.5mm Toray® premium high-grade graphite motorplate
Hardened chromoly gears
Stainless steel shafts
Stainless steel oiled bearings
Stainless steel hardware

Grind 431™ V2

The ultimate LCG OD transmission for taking your scale rock crawling to the highest level.

Grind™ 431 V2 LCG OD Transmission by PROCRAWLER®

$195.34Select options

Frequently Asked Questions

What is an LCG OD transmission?

To understand the essence of an LCG OD transmission for scale rock crawling first we have to define what LCG and OD are.

What is LCG?

The LCG stands for “low center gravity”. This is a build style, a way of thinking in the scale rock crawler scene. The key focus in LCG is on getting the center of gravity as low as possible which makes your rig more capable when it comes to climbing upwards, sidehilling or downwards.

Based on these the optimal LCG transmission is as light and as low as possible. Recent stage the Grind™ 431 V2 LCG OD Transmission is the lightest and lowest LCG transmission in its class with 31mm housing height and 48g net weight.

What is OD?

The OD stands for “overdrive”. Overdrive is a solution to drive one of the axles faster than the other. In scale rock crawling the basic goal is having the proper front overdrive which means that the front wheels are rotating faster than the rear ones.

We at Team PROCRAWLER® spent tons of wheel hours on the rocks putting our Flatgekko™ rigs in work and found 31% as the sweet spot when it comes to overdrive rate.

That’s why we designed the Grind™ 431 V2 LCG OD Transmission around this magical value and implemented 31% overdrive in it.

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Grind™ 431 V2 LCG OD Transmission ➝

Why are weight and height so important?

If you want to keep the COG (center of gravity) of your scale crawler rig as low as possible it is critical how much weight you add above the chassis rail lines.

As center positioned transmissions are mounted on the skid of your rig, it is very important to have it as light and as low as possible to minimize the weight above the chassis rails.

Recent stage the Grind™ 431 V2 LCG OD Transmission is the lightest and lowest LCG transmission in its class with 31mm housing height and 48g net weight.

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Grind™ 431 V2 LCG OD Transmission ➝

What chassis rails is the Grind™ 431 V2 compatible with?

We designed and engineered the Grind™ 431 V2 LCG OD Transmission to be compatible with all major performance chassis rails available on the market. As it comes with its dedicated skid the only requirement is having the market standard skid mounting hole pattern on your rails.

Of course, the most seamless fit are the geometry of the PROCRAWLER® LCG chassis systems:

If high-performance is a key focus for you, these pro level pairing will be a blast for you and your scale rock crawling experience.

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Grind™ 431 V2 LCG OD Transmission ➝
Flatgekko™ C23 V2R LCG Chassis Kits ➝
Flatgekko™ C1 V1 LCG Chassis Kits ➝
Yuuki™ FS1 V1 LCG Chassis Kits ➝
Madstockr™ SCX10II LCG Chassis Kits ➝
Madstockr™ Enduro LCG Chassis Kits ➝

What axles to choose for the Grind™ 431 V2?

We designed and engineered the Grind™ 431 V2 LCG OD Transmission to be compatible with all major capable axles available on the market:

  • AR44 axles and their clones
  • AR45 straight axles and their clones
  • Enduro axles and their clones
  • AR45P portal axles and their clones
  • Capra portal axles and their clones
  • F10 Phoenix portal axles and their clones
  • TRX-4 portal axles and their clones

IMPORTANT!

The different axles may require different motor gearing (pinion and spur gears) to get the proper performance on the rocks. You can find detailed informations about motor gearing and recommended pinion/spur pairings in the What size pinion and spur to use for the Grind™ 431 V2? section.

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Grind™ 431 V2 LCG OD Transmission ➝

What size pinion and spur to use for the Grind™ 431 V2?

The different axles may require different motor gearing (pinion and spur gears) to get the proper performance on the rocks.

We collected the recommended motor gear pairings and gear ratios for all major capable axles available on the market below.

IMPORTANT!

As all scale crawler setups differ, these are only recommendations which doesn’t mean that you can’t follow your own ideas and experience. You want to test out the best setup for you and your driving style.

Grind 431™ V2 Front Drive Ratio
42.78:1 /w 9T/56T Pinion/Spur + AR44/AR45/Enduro Axles Or Clone
46.79:1 /w 13T/56T Pinion/Spur + AR45P/Capra/F10 Axles Or Clone
42.93:1 /w 17T/56T Pinion/Spur + TRX-4 Axles Or Clone

Grind 431™ V2 Rear Drive Ratio
58.33:1 /w 9T/56T Pinion/Spur + AR44/AR45/Enduro Axles Or Clone
63.80:1 /w 13T/56T Pinion/Spur + AR45P/Capra/F10 Axles Or Clone
58.55:1 /w 17T/56T Pinion/Spur + TRX-4 Axles Or Clone

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Grind™ 431 V2 LCG OD Transmission ➝

Which skid option to choose for the Grind™ 431 V2?

You can pick your Grind™ 431 V2 LCG OD Transmission with 2 skid options.

6º Re-Angled Skid

The 6º Re-Angled Skid can be used for any chassis rails that has the market standard skid mounting hole pattern and an angled skid line. The final positioning of the Grind™ 431 V2 transmission will be horizontal if the skid angle is 6º.

Straight Skid

The Straight Skid is your choice if you plan to use the Grind™ 431 V2 with a straight skid chassis.

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Grind™ 431 V2 LCG OD Transmission ➝
Flatgekko™ C23 V2R LCG Chassis Kits ➝
Flatgekko™ C1 V1 LCG Chassis Kits ➝
Yuuki™ FS1 V1 LCG Chassis Kits ➝
Madstockr™ SCX10II LCG Chassis Kits ➝
Madstockr™ Enduro LCG Chassis Kits ➝

What is included in the box?

We designed the Grind™ 431 V2 LCG OD Transmission as a plug’n play product. That’s why we ship them fully assembled, waterproof greased with G2 Waterproof Premium Graphite Silicone Grease, mounted on the skid and placed on a foam insert in its badass black laser engraved box.

IMPORTANT!

At recent stage motor gears like pinion and spur are not included.

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Grind™ 431 V2 LCG OD Transmission ➝