Product Documents
CAD FIles in zip format
Assembly
JCR SSP 2.0 Combat Robot Kit – Transmitter Bundle
SSP 2.0 — The Most Upgradable Beetleweight Kit
The SSP 2.0 Beetleweight Combat Robot Kit is designed by Seth Schaffer of Just ‘Cuz Robotics — the team known for competing alongside Bloodsport on BattleBots. Built on a single-piece UHMW billet chassis, the SSP 2.0 comes with three front-end configurations (two fork options and a wedge), a battery, receiver, and custom motherboard. Anyone 10 and up can build it. Full CAD files are included and available on our site under Product Documents so you can mod, print, and make it your own.
If this is your first bot, you’ll need a transmitter and a charger. The SSP 2.0 Beetleweight Transmitter Bundle includes a FlySky FS-i6 transmitter with receiver. It’s ideal for builders who already have a LiPo charger but need a transmitter. If you need both a transmitter and charger, choose the SSP 2.0 Transmitter & Charger Bundle.
$509.99
What it is / Who it’s for
The SSP 2.0 Beetleweight Combat Robot Kit is the brushed drive edition of the popular beetleweight lifter kit from Just ‘Cuz Robotics. It’s designed for first-time and experienced builders who want a proven, competition-capable beetleweight platform with straightforward assembly, clean wiring, and a strong community behind it. More than 220 SSP 1.0 kits have competed in tournaments worldwide since 2023 — the 2.0 builds on everything learned from those.
How it works
Dual DartBox Dragon brushed drive motors and the WEKA 20A dual brushed ESC handle drive with no programming required. A 32kg-cm servo controls the lifting arm. The custom JCR Motherboard handles power distribution, switch, LED, and dual voltage BECs in one small package — keeping the build clean and troubleshooting simple.
What’s included / What you’ll need
The SSP 2.0 Beetleweight Transmitter Bundle ships as a single unit with everything needed to build the robot: UHMW billet chassis, all drive and servo electronics, three front-end configurations (barbed forks, claw forks, and wedge), a 3S 550mAh LiPo battery, FS2A receiver, and the JCR Motherboard. This bundle also includes a FlySky FS-i6 transmitter — Seth’s recommended starter radio, compatible with both SSP Standard and Pro. You’ll still need a LiPo charger, soldering equipment, and basic tools. Prefer a pistol-grip style radio? The Radiomaster MT12 is a popular alternative — sold separately.
| Component | Details | Included |
|---|---|---|
| SSP 2.0 Combat Robot Kit | Complete kit with chassis, electronics, front-ends, battery, and receiver | ✅ |
| FlySky FS-i6 Transmitter | Seth’s recommended starter radio — works with SSP Standard and Pro; drive mixing must be programmed on the radio | ✅ |
| LiPo Charger | Not included — needed to charge your battery | ❌ |
Need a spare battery? Our Galaxy 450mAh 3S XT30 is connector-compatible and a good event spare — slightly smaller than the included 550mAh but fits and works.
Modularity and upgrades
The SSP 2.0 was redesigned from the ground up for modularity. 3D printed motor mount inserts mean you can swap to brushless drive (Blitz Lite motors + AM32 ESCs) without replacing the chassis. The vertical spinner module attaches via a dedicated cutout in the chassis base. CAD files for all components are available under Product Documents — print your own replacement parts, design custom attachments, or modify the chassis to suit your build. Want to see what others have done? Check out the SSP mod gallery.
All SSP 2.0 CAD files are also available directly on GrabCAD — STEP models for all configs, attachments, and addons.
Competition record
SSP kits have placed in tournaments across the US and internationally. Watch the SSP 2.0 go up against NHRL’s Rank 1 beetleweight Mako: SSP vs Mako at NHRL. There’s also an active SSP Owners Group on Facebook for build help and community support.
Sold as a bundle — one SSP 2.0 kit and one FlySky FS-i6 transmitter per order.
Safety Warning:
Weaponized robots are not toys. Spinning weapons generate extreme kinetic energy—comparable to a power tool. Always use caution, engage a weapon lock, and test kinetic energy only within a secure arena or test box.
Resources for robot safety and safe testing:
- ItGresa Combat Robotics Safety Guide
- FingerTech Combat Robot Safety Guide
- FingerTech Test Box Build Instructions (PDF)
Just ‘Cuz Robotics Test Box video:
Having trouble playing this video? Try disabling your VPN, or watch it directly on YouTube.
Features
- Transmitter included — this bundle adds the FlySky FS-i6, Seth's recommended starter radio; ideal for builders who already have a LiPo charger. Prefer pistol-grip? The Radiomaster MT12 is available separately.
- Proven competition platform — over 220 SSP 1.0 kits competing worldwide since 2023; 2.0 builds on everything learned
- Three front-end configurations included — barbed forks, claw forks, and wedge; swap in minutes
- Modular by design — 3D printed motor mount inserts support brushless drive upgrade without replacing the chassis
- Clean wiring via the JCR Motherboard — power distribution, switch, LED, and dual BECs in one package
- Vertical spinner module support — dedicated chassis cutout for the optional spinner addon
- Full CAD files included — print replacement parts, design custom attachments, or modify freely
- Builder-friendly assembly — suitable for ages 10 and up; no drive programming required
- Part of the SSP 2.0 ecosystem — spares, upgrades, and accessories available from ItGresa
Notes:
- Small hardware and 3D printed parts are not listed in this maintenance table
- The SSP UHMW chassis and Titanium lids are no longer offered in SSP 1.0 versions
- G10 lids for SSP 1.0 are only available for a limited time. When they are gone, they are gone
- Select Dragon motors for SSP Standard; select Blitz Lite motors for SSP Pro
- Select the 74T 222mm belt (4mm wide)
This robot requires a transmitter and receiver-compatible charger to operate. If you don't already have these, we suggest the FS-i6 and C6D charger, or pick up one of our bundles. This bundle includes the FlySky FS-i6 transmitter. For transmitter documentation and setup, see the FS-i6 product page.
| View | Kit | Description | In Stock | Price | Qty Per Kit | Buy |
|---|
SSP 2.0 Standard — Transmitter Bundle Configuration
| Component | Details | Included |
|---|---|---|
| SSP 2.0 Combat Robot Kit | Complete kit with chassis, electronics, front-ends, battery, and receiver | ✅ |
| FlySky FS-i6 Transmitter | Seth's recommended starter radio — works with SSP Standard and Pro; drive mixing must be programmed on the radio | ✅ |
| LiPo Charger | Not included — needed to charge your battery | ❌ |
SSP 2.0 Standard Specifications
| Specification | Details |
|---|---|
| Chassis | Single-piece UHMW billet (Ultra High Molecular Weight Polyethylene), machined to precise tolerances |
| Drive Motors | Dual DartBox Dragon brushed gearmotors |
| Drive ESC | WEKA 20A dual brushed ESC with built-in drive mixing, no programming required |
| Arm Servo | Just 'Cuz 32kg-cm coreless servo |
| Wiring | JCR Motherboard — power distribution, switch, LED, dual voltage BECs |
| Battery | 3S (3 cells, 11.1V) 550mAh LiPo with XT30U connector — included |
| Receiver | FS2A 2.4GHz (AFHDS-2A protocol) — included |
| Transmitter | FlySky FS-i6 — included in this bundle. Drive mixing must be programmed on the radio. Prefer pistol-grip? See the Radiomaster MT12 (sold separately). |
| Wheels | LEGO tires standard; upgradeable to cast urethane rubber wheels |
| Drive Shaft | 4mm |
| Front-End Options | Barbed forks, claw forks, and wedge — all included |
| Spinner Module | Vertical spinner module sold separately |
| Assembled Weight | ~2.3lb with fixed forks (~11oz remaining for customization). Actual weight varies by configuration — claw forks add ~0.08lb, wedge configuration adds ~0.2lb. |
| CAD Files | Available for all components — see Product Documents |
Frequently Asked Questions
What's included in this bundle?
This bundle includes the complete SSP 2.0 kit plus a FS-i6 Transmitter. The kit itself includes everything needed to build the robot: UHMW billet chassis, dual DartBox Dragon drive motors, WEKA 20A dual brushed ESC, 32kg-cm servo, JCR Motherboard, FS2A receiver, 3S 550mAh LiPo battery, and three front-end configurations (barbed forks, claw forks, and wedge). Full CAD files for all components are included via Product Documents.
What else do I need to run it?
You'll need a Charger, soldering equipment, and basic tools (4mm hex key, T15 Torx driver, needle nose pliers). Blue Loctite 242 or 243 is strongly recommended. The full list of required tools and equipment is in the assembly guide under Product Documents.
Who can build this kit?
The SSP 2.0 is designed for builders ages 10 and up. Soldering is required — adult supervision is recommended for builders under 13. Everything else can be assembled by anyone who can hold a screwdriver. Even 10 and 11-year-olds have competed successfully with SSP kits at events around the world.
What changed from SSP 1.0 to 2.0?
The 2.0 is a ground-up redesign. Key changes:
| Area | SSP 1.0 | SSP 2.0 |
|---|---|---|
| Chassis height | 1.25in | 1.20in |
| Motor mounts | Fixed design, brushed only | 3D printed inserts — supports both DartBox brushed and Blitz Lite brushless |
| Vertical spinner | No dedicated support | Dedicated chassis cutout; lid shortened to allow inverted driving with spinner attached |
| Wheels | Custom cast urethane only | LEGO tires standard (widely available); urethane wheels available as upgrade |
| Fork/wedge mounts | Original dovetail design | Revised dovetails — harder to pop out during a fight |
| Parts compatibility | — | Most 1.0 components (motors, ESCs, servos, wheels, belts, Motherboard) work on 2.0 chassis with printed inserts |
Can I upgrade to brushless drive?
Yes. If you have a 3D printer, you can print the Blitz Lite motor inserts (PETG-CF, PA-CF, or similar high-temp impact-resistant filament recommended) and add JCR-RC 35A AM32 ESCs and Blitz Lite 2850kV drive motors. You'll also need 6mm bore hubs to match the Blitz Lite's 6mm shaft. The 4S LiPo used in the Pro kit is recommended for best performance with brushless drive, though 3S will work at reduced speed. The optional 42kg-cm brushless servo is an upgrade but not required.
What's the difference between SSP 2.0 Standard and SSP 2.0 Pro?
The Pro upgrades the drivetrain to Blitz Lite brushless motors, AM32 ESCs, a 42kg-cm brushless servo, and a 4S power system — delivering more speed, power, and responsiveness. The chassis and overall layout are the same. See the full comparison on the SSP 2.0 Pro page.
WHAT ABOUT MIXING MY transmitter?
The SSP 2.0 Standard and Pro kits have different drive ESC setups, and that affects how you need to configure your transmitter. The Standard kit uses the WEKA ESC which has built-in drive mixing — so the transmitter must send unmixed signals and you should not program drive mixing on the radio. The Pro kit uses two separate brushless ESCs with no built-in mixing — so the transmitter must have drive mixing programmed.
The FS-i6 Transmitter, included in the bundle, supports on-device mixing programming, and Seth's assembly guide (under Product Documents) walks you through the setup step by step. The FS-i6 is the budget-friendly entry point; the Radiomaster is the better long-term radio if you plan to run multiple bots.
Summary: Standard kit — do not program drive mixing on the TX. Pro kit — you must program drive mixing on the TX.
As seen on TV?
Yep. The SSP kit was featured on the Today Show. Watch the segment here.
