RazrRails
Floatboxx RazrRails are a rail and box system specifically designed for racing and travelling. We want to move the sport to the next level by providing special racing boards.
A 28 mm (1-1/8") slim frame, including battery and controller compartments featuring:
- 3 riding heights: max. physical clearance VS lowest CoG
- easy accessible battery and controller compartement
- space for up to 30x 21700 Li-ion cells
- 5°/5° footpad angles
- supporting various VESC controllers through modular heatsink plates
- Compatible with all XR platform footpads
- 309 mm between footpads to fit big tires
- small handle
* for safe air travel, check with your carrier.
A small series will be ready by early July 2024. Shipping week 28.
Construction
Stainless steel self-supporting mono-frame. Rails and boxes in 1 single welded piece.
All connections with cable glands.
Satin finish on the visible surfaces.
Maximum physical clearance / low CoG with 3 riding heights
RazrRails are 28 mm slim excluding footpad, compared to 46 mm for stock XR and 49 mm for XR with Bang Bumpers.
You choose how to spend that extra 21 mm by mounting the axle blocks on any of 3 settings:
- 25° angle of attack
- 26° angle of attack
- 27° angle of attack
Footpads
RazrRails are compatible with all XR type of footpads.
The footpads are the lid to access the battery and controller compartments. Dust and water sealing is done via a foam patch. Fast access to the compartments by removing the footpads with only 4 screws (up to 6, depending on your footpad type and setup).
The footpads are supported by internal vertical walls between the packs to avoid compressing the battery.
Stiff footpads (stock, Surestance) can be used as such. Flexible footpads require our CXC footpad support plates for stiff = splash-waterproof sealing.
VESC mounting
The VESC is mounted on a 4 mm aluminum heatsink that is bolted to the bottom of the RazrRails, and as such is directly air-cooled. The heatsink falls within the extremities of tire and bumper so does not touch ground on straight surfaces. An extra 4 mm spacer is supplied if you use the Tronic 250R with vertical capacitors. Tronic 250R with horizontal capacitors to be tested.
Battery
We designed the Razr Rails for 5 six-packs of 21700 cells. So there is space for up to 30 21700 Li-ion cells. In this maximum configuration there is no space for a BMS. Charging without BMS is not advised. We charge regularly via an external BMS to check the balance and state of the cells.
Battery pack maximum dimensions 133x77x23 mm with short cables ~40 mm
- Rails have 25 mm inside height so you use foam padding to protect the battery packs.
- The box area has 26,5 mm height below the footpads.
We advise Molicel P45B as they allow a discharge of up to 45A.
The following configurations are possible.
- 5x 6s1p for 30s1p (486 Wh capacity, 50% more than stock XR)
- 4x 6s1p for 24s1p and BMS (389 Wh capacity, 20% more than stock XR)
- 5x 3s2p for 15s2p (486 Wh capacity, 50% more than stock XR)
- 4x 5s1p for 20s1p and BMS (324 Wh capacity = stock XR)
Bumpers
Front and rear bumpers are to be 3D printed by the user. They only cover the front (rear) of the box but not the bottom (similar to Onewheel+ bumpers). A small handle sits in the bumper. The 3D file will become available.
Charging/Switch
We looked for a very compact solution to fulfil both functions. There is 1 cable gland available in the 4rd corner to bring both cable pairs out.
We supply a special 4-core cable and XT90i (4-pins) which fits inside a pocket in the rails (rails are locally enforced):
- The XT90i female is to be connected to the board via the cable gland
- One male XT90i is to be connected to the charger (2 large pins only)
- Another male XT90i is you "key". Short the 2 small pins so they act as the "enable" for the VESC
Front <> Rear
What is the rear of a Onewheel?
As RazrRails are very balanced, the rear, or heavy side is either the side with 3 battery packs or in the case of 24s1p, the side with the VESC.
A Kush footpad in the rear also helps to tip the scale...
Content of delivery
- RazrRails stainless steel mono-frame, with
- modular alu heatsink for the VESC controller of your choice. Currently supported:
- LFocer/Tronic 250R (with vertical capacitors; horizontal capacitors to be tested)
- Ennoid ESC (3 holes in Ennoid must be enlarged to ¤3,5mm for our M3 studs)
- alu bracket to protect the battery-packs.
- bolts for footpads, bumpers, heatsink
- modular alu heatsink for the VESC controller of your choice. Currently supported:
- Sealing
- Strong polymer caulking kit to seal all gaps
- a large patch of 2 mm foamrubber to glue to the footpad for sealing and inside the boxes to protect the battery packs.
- Cabling
- Floatboxx 14-core cable (bare, no connectors)
- Floatboxx 4-core cable for the charge/switch port (bare)
- 4 cable glands for battery, motor, charger/switch connection
- 1x XT90i-F and 2x XT90i-M for charging and on/off switch
To be provided by you
- VESC controller
- battery packs
- BMS
- footpads (+support plates for flexible footpads)
- motor with bullet connectors
- internal wiring
- bumpers (3D model pending)
- splash caps (3D model pending)
RazrRails are not
Although the steel slides very well, RazrRails are not meant to be your daily curb nudger/trick board. All components mount directly in the boxes. The boxes are the bottom of the board. There are no floatplates.
There are currently no features to support LEDs other than the 4rd cable gland that can take more cables if needed. The 3D-printable bumpers are the easiest to add lights to with direct access to the box by drilling a hole and using a small cable gland.