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As the longest operating bicycle retailer on Trade Me, Bicycle Spares Ltd offers a large range of quality products at very competitive prices backed up with first class customer service as our 100% positive feedback demonstrates.

Please click ?about the store? for full business and contact details including our warranty and returns policy.


This new wireless cycle computer features not only with its modern and innovative look, but also with its PC configuration. This means that all accumulated data can be read-out from the device. Due to the TwoInOne system it is possible to use two different wheel circumferences. The CM 4.21 comes inclusive transmitter-belt!

Top Features:
¦Huge, easy to read 3-line display (up to 10% larger than in the previous model)
¦Individually configurable display (Multi Choice System)
¦Aerodynamic design, scratch resistant casing
¦Save your totals on your pc and set-up the device with a software interface
¦Ease of use due to our Twist Klick handlebar bracket
¦Multi Lock handlebar brackets, also suitable for bike stem installation
¦Fast battery exchange due to quick lock

Bike functions
Speed (current/average/maximum)
Speed comparisons
Trip kilometers
Programmable total kilometers
Trip/total time
TwoInOne system
Auto start/stop

Heart rate functions
Heart rate (current/average/maximum)
Programmable heart rate limit (upper & lower limit)
Calculated optimal training zone
Exercise time above within or below your targeted heart rate range
Calories burnt (current/total)

Additional functions
Time (12/24 h)
PowerDown mode
PC configurable

Product Name: Ciclosport Ciclomaster CM 4.21 HR Computer + Heart Rate Monitor

Year: .

Weight: approx. 63 gram

Included in delivery: CM 4.21, handlebar bracket and sensor, spoke magnet, transmitter belt including elastic strap and mounting materials

Color: black

Wireless: Yes Please click here to ask a question
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Shipping options

Buy more than one of this item and only pay for shipping once.
  • RURAL - Posthaste Courier$9.00
  • URBAN - Posthaste Courier$4.00
  • Urban Wellington - Posthaste Courier$2.00
  • HIGHER Shipping already paid on another item$0.00
  • Store does not allow pick-ups
  • Store location: Wellington City, Wellington, NZ

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