For most riders there are two main limitations to getting started with a power meter: cost and compatibility. Step forward the F aptly named Limits BIA, which sits between your pedal and crank and can therefore be fitted to any bike regardless of crank, bottom bracket and pedal type. And at £229 it's also one of the cheapest power meters if not the cheapest - on the market.
With a claimed power accuracy of +/-2%, the BIA is a small, circular plastic and carbon-fibre device with metal pedal/ crank threads. It is single-sided only.
Measuring 42mm in diameter and 18mm thick, an 18mm spacer is included to add between the right pedal and crank to balance out the increased Q-factor between each side for a total increase of 36mm on a typical 150mm-wide road bike.
Total weight is 97g including two SR44 coincell batteries (included) and the driveside pedal spacer - close to the extra weight of some pedal power meters. Battery life is a claimed 80 hours. Waterproof rating is IP54, meaning it has protection from "water splashes" so it's unlikely to stand up well to winter or off-road riding.
Set-up
Fitting the plastic battery covers using a coin is a little tricky as it's not that easy to see or feel how well lined up they are and there's not a firm end point.
Limits says it has designed the cover to break if it's overtightened and two spare covers are included.
This story is from the March 23, 2023 edition of CYCLING WEEKLY.
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This story is from the March 23, 2023 edition of CYCLING WEEKLY.
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