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Serfas Bicycle Computers and Heart Rate Monitors

About Serfas - "Wherever your road leads we know cyclists seek the ultimate ride. With that in mind, Serfas is always striving to make products that reflect those wants and needs. Our 20-plus year commitment to quality, performance and customer service is reflected in our innovative products that are rider-tested and rider approved."

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Showing 6 products:

Serfas Level 1 Wired SI-10
Serfas Level 1 Wired SI-10Serfas

The most affordable computer is really easy to use and features a crystal clear display. 9 functions: Current Speed, Average Speed, Max Speed … read more

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your price $20.00

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Serfas Level 3.3 Double Wireless Cadence SI-30
Serfas Level 3.3 Double Wireless Cadence SI-30Serfas

Whether you're interested in a more effective training program or simply into the maxim that "knowledge is power" the level 3's impressive feature list … read more

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your price $80.00 + ships free

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Serfas Level 4 Wireless Speed SI-40
Serfas Level 4 Wireless Speed SI-40Serfas

Serfas' Level 4 Computer has everything a bike rider needs and comes equipped with 22 usable functions that are easily programable. 19 functions: … read more

Currently Sold Out

your price $45.00 + ships free

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Serfas Level 1+ Backlit Wired Speed SI-15
Serfas Level 1+ Backlit Wired Speed SI-15Serfas

Our newest line of cycling computers feature a large backlit LED display. It is mountable on the handlebar or stem. It is equipped with Auto Scan and … read more

Currently Sold Out

your price $30.00

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Serfas Level 4+ Backlit Wireless Speed SI-45
Serfas Level 4+ Backlit Wireless Speed SI-45Serfas

Our newest line of cycling computers feature a large backlit LED display. It is mountable on the handlebar or stem. It is equipped with Auto Scan and … read more

Currently Sold Out

your price $50.00 + ships free

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Serfas Level 2 Wired Ultra Slim Design SI-20
Serfas Level 2 Wired Ultra Slim Design SI-20Serfas

Serfas' SI-20 computer has everything a bike rider needs and comes equipped with 14 usable functions that are easily programable. 14 functions: … read more

Currently Sold Out

your price $25.00

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Serfas

"Wherever your road leads we know cyclists seek the ultimate ride. With that in mind, Serfas is always striving to make products that reflect those wants and needs. Our 20-plus year commitment to quality, performance and customer service is reflected in our innovative products that are rider-tested and rider approved."

See all Serfas

Wired Speed allows a sensor to transmit the bicycles speed via a connected cable to the computer.

Computer Color

Some cycling computers can display a power reading, usually in watts. They usually require a separate sensor - in some cases a special hub or crank arm. A few will estimate the value based on speed, cadence, rider weight or other data. "Optional" means it can read from a separate power meter or sensor. "Included" means it is calculated by the computer or includes the neccessary sensor.

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Wireless Speed allows a sensor to transmit the bicycles speed without a cable to the computer.

Wireless Cadence allows a sensor to transmit the bicycles cadence (also known as RPM) without a cable to the computer.

Temperature monitoring allows for a computer to tell you the current temperature.

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