After debuting at Interbike last fall, 4iiii’s crank arm based power meter has become smaller, using a new casing to give it a lower profile for better frame clearance.
They also gave it tabs for a rubber strap to hold it in place and apply continuous pressure while the bonding agent cures and permanently affixes the unit to your crank. That aids in self installs, but for now they’re doing factory installs where you send your crank arm in and have them apply it.
Why? Because they’re refining the epoxies to make it as simple as possible to insure you’re able to install it perfectly. In the meantime, they’re including the back and forth shipping of your crank in the $399 price.
It’s left only for now, right side will be ready in June. It’ll have a slightly different shape and plastic because it needs to be located behind the chainrings, which has a tighter clearance and needs to address battery accessibility.
While it may be a bit smaller now, those tabs on the unit for the straps aren’t exactly pretty. So, technically they’re not necessary once the unit is affixed and fully cured and could be shaved/grinded/sanded off without harming anything (except maybe the warranty).
The 4iiii started shipping about three weeks ago and they’re filling pre-orders now.