

Discover a seamless connection for your Keiser M3i with the K2pi alternative converter. This innovative solution links your bike to popular apps like Zwift, Peloton, and even syncs with your Garmin watch.
Are you frustrated with the frequent disconnections of the ‘Keiser M series Bluetooth Converter’ during your rides, or the constant need to replace its battery? You’re not alone.
Choose the K2pi alternative for a hassle-free experience. These USB-powered converters are always ready, ensuring a reliable connection every time you cycle - it simply works!
Shipping Details: (based in UK - ship Worldwide)
- Standard UK delivery for stands/tools: £1.99
- Converters: FREE within the UK
- International shipping for converters: £4.50(tracked worldwide incl US tariffs) not EU anymore sorry see my eBay store for EU where tax is included.
- Non-trackable international post for tools/stands: £4.50
Purchase a replacement Memory Card containing Current software (proM) /will also provide Speed to all existing K2pi+ (ant) users. FREE POSTAGE FOR THIS ITEM.
IMPORTANT NOTE : Available to former K2pi Purchasers ONLY! A refund admin fee of £2 will be charged to all orders who do not own an existing K2pi+ Prior to issuing a refund - you’ve been warned!!
Upgrade/replacement will be at cost of parts (sd ~£6.00) + postage cost/exchange fees only to ALL existing K2pi bluetooth, K2pi+ or proM owners.
NOTE - User will be required to remove converter lid, usb power cable & Ant dongle to replace the SD card. (instructions will be included, simple and will only take a few minutes.)
Garmin Multisport watches - eg Fenix etc. native Power profile watches will allow the Speed & cadence profile to work as well as the existing Power profile.
Garmin watches WITHOUT Power profile eg 245/245m/vivo3/vivi4 etc will now work as well - to provide Speed and Cadence (over Ant+ only - so check your Garmins compatible or message/email me)
Made in the United Kingdom (UK).
As a self employed architect and a single parent of two homeschooled kids, I had to take a break from my work during Lockdown 3.0. My keiser bike has been my lifeline in these tough times, keeping me fit and happy while the kids are busy with their studies or when it’s too cold to go outside.
I came up with the idea of making my own keiser Bluetooth converters after seeing how many compalints there were for Keizer’s attempt. (I never bothered with the official Keiser M converter - it had too many issues and was way overpriced - £130 in the UK!)
I started with 10, then 20, then 50, then 100… and I might make some more if there is demand - Let’s see how it goes… Enjoy your ride 🚴🏼♂️🚴🏼
What does K2pi mean? It’s just a short way of saying ‘Keiser to Pi’ (as In raspberry pi computer which I use for every converter).