76mm Gamechanger Recreational Aggressive Inline Skating Frame

Last crawled date: 4 years, 1 month ago

pretend_gamechanger_76mm.stl 1e695f8597344dc0fb2b4500b6f9cfd7fa5fbd3a74e518fabc502e7130d84dda (sha256)
The FFS Gamechanger adds the speed, maneuverability and impact absorption of rockered 76mm wheels to an uncompromising layout with ride height and grinding characteristics similar to a conventional aggressive flat setup.
Designed for 76mm wheels
Replaceable/printable grind block protects, minimizes wheel bite and frame sidewall friction
FFS Frame System enables lowest possible ride height
Backslide height/angle comparable to Valo aggressive frame
Can be ridden with smaller wheels using an alternate grind block
Fully open source, flexible, maintainable skeleton-grind block platform
Characteristics
293mm wheelbase
139mm 2-3 split
44mm skeleton height
35.5mm backslide height (groove to mounting surface) (FFS)
309mm total skeleton length
76mm ideal wheel size
1/1.5mm Plantain Rocker (wheels 2&3)
~390g (13.75oz) weight - assembled with 1pc axles, FFS mount in 6061-T6* aluminum skeleton, UHMW grind block
Replaceable/printable grind block can be customized and printed or machined from a wide variety of materials
Frame skeleton can be machined from aluminum (CNC, by hand) or printed (2pc axles-only, with some modification)
Grind plate-compatible (using 2pc or longer hexside single-piece axles)
WARNING: for professional use only
Two Versions
FFS
Easier to build
Absolute lowest possible ride height, shallowest backslide height [angle]
Requires UFS nub removal from boot (can later be supplemented with included washers for standard UFS/Salomon frame use)
Skeleton optionally mountable with 3 bolts (2 UFS + Grind Block) for improved frame-boot rigidity
Adjustable pronation & carve angles
Can use thinner, lighter weight overall skeleton material (ex: 3.18mm (1/8") thick 6061-T6* aluminum)
Requires wheel wells (wheels > 72mm)
FFS/UFS
More difficult to build
Requires minimum 4.75mm (.1875") skeleton mountside material thickness (for UFS cavities)
No UFS soul/mounting base adjustment required
Taller ride height (+3-5mm)
Less rigid mount (2 bolts vs. 3)
Frame pronation and carve angle adjustment not possible
Position 2 & 3 wheel wells not required
Standard 8mm axles and insert spacers OR 8mm single piece axles (require minimum 4.75mm (.1875") thick skeleton material) can be used for either approach
WTFFS?
FFS, the FFS Frame System, consists of two flat surfaces which use one or more connecting elements to fasten an inline frame/chassis to a boot.
Buy @stabyourselfintheframe.com 2020/01/01
Design files, dimensions subject to change
FAQ
Where are the UFS mounts and/or mounting holes in the file?
The included design is optimized to deliver the lightest weight and lowest ride height possible using the FFS Frame System. Traditionally sized UFS-Salomon mount cavities (20mm diameter, ~2mm depth) can be added, but require minimum 4.75mm (.1875") thick mountside skeleton material, which increases ride height by 3-5mm.
Freed from Salomon's placement of UFS nubs, one can adjust frame pronation and stride angles as desired, which results in unique mounting bolt locations specific to each application. Ride height can also be lowered considerably.
Which boots are adaptable to FFS?
Any boot with a flat mounting base: most or all UFS/Salomon-compatible models. Among the easiest to adapt are Xsjados and THEM skates, which only require modifications to the soul plate.
Will the provided design be the only version available for purchase?
No, FFS and FFS/UFS mounts will be offered.
What materials can the grind block be printed in or machined from?
PLA, PETG, ABS, Nylon, Acetal/POM (Delrin) via FDM with infill of at least 70% and machined UHMW all work well; Alumide formed via SLS might also be a good idea. Each material has advantages and drawbacks, but machined UHMW Polyethylene is likely the best overall option for ideal grinding characteristics and durability; PLA FDM is probably the absolute cheapest. Made 2-3mm wider than the frame skeleton (4-6mm total), the grind block also reduces sidewall friction on soul grinds.
How is this different from/how does this improve BIG/Bake frames?
Wheel size is larger and ride height is comparable, while the frame is stiffer and more maneuverable. The backslide height is shallower, the groove is wider, and the groove element can also be replaced.
How do these compare to 72mm or 80mm Aeons?
The backslide height is shallower than Aeon 72 (35.5mm vs 41mm) or Aeon 80 (35.5mm vs 44mm), ride height is lower, the groove is wider, and the groove element can also be replaced.
There aren't any aggressive 76mm wheels -- what 76mm wheels do you recommend?
The grind block is designed such that wheel bite should rarely be an issue, which makes experimenting with much softer wheels possible. 80A+ 76mm wheels are also easy to find.