MX5 Pro Competizione 50s vs 45B: The 82V Editions Explained
Talaria’s Competizione editions push the MX5 Pro to 82V and 21–23 kW. What the 50s and 45B designations mean, how they differ, and who these factory race builds are really for.
At the top of the Sting family sit two bikes most buyers have never seen in person: the MX5 Pro Competizione 50s and Competizione 45B — 82V factory builds currently offered around $4,000, making 21 and 23 kW respectively. Here is what the cryptic names mean and who should actually buy one.
Decoding the names
The suffixes describe the cells. “50s” denotes packs built on Samsung 50S-class 21700 cells — the high-discharge cell prized for current delivery; this build makes 21 kW peak (22 kW continuous). “45B” denotes its sibling cell configuration trading a little capacity for even harder discharge — 23 kW peak. Both run 95%-efficiency IPM motors and the 82V architecture that pushes them past everything else wearing a Sting frame.
Where they sit in the range
Above the standard 72V MX5 Pro (13.4 kW, reviewed here) and squarely into flagship power — 21–23 kW in a Sting chassis is a wilder proposition than the Komodo’s 32 kW in its bigger frame. The Competiziones are the choice when the question is power-to-weight rather than absolute power; the speed ranking puts numbers on it.
Who they are for
Closed-course riders, racers and the builders who would otherwise spend a year assembling an equivalent from the controller and battery catalogues — the factory Competizione is effectively that build with a warranty and matched engineering. If your riding is trail-paced, this hardware is capability you will pay for and rarely touch; the matching guide will happily talk you down to an MX4.
Choosing between 50s and 45B
Splitting hairs between siblings: the 45B’s extra 2 kW peak suits drag-style and hard-launch riding; the 50s’ configuration favors sustained sessions. At matching prices (current numbers), pick by riding pattern — or by which is in stock, since these editions move in small batches. Ask us what is on the water.
Ownership notes
82V systems concentrate everything the battery care guide preaches: heat discipline after full-power runs, quality charging, and consumables budgeted like a race bike — because it is one. Chassis prep matters too: suspension set for your weight (setup guide) before the first full-power session, not after.
Frequently asked questions
Are Competiziones street legal?
No — closed courses and private land; road riders want the L3E.
Can a standard MX5 Pro be upgraded to match?
Close, via the aftermarket — the factory versions bundle matched engineering and warranty; the DIY path is the upgrade guide’s final chapter.