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Knog Nerd 12 Function Cycling Computer

by Knog

RRP: £59.99
Price: £39.23 FREE UK delivery.
You Save: £20.76 (35%)
Only 5 left in stock.
Dispatched from and sold by WoollyHatShop.
5 new from £39.23
12 Function
Black
  • Multi bike selection for 2 bikes
  • Current Speed
  • 12/24 hour clock
  • Trip Distance
  • Average Speed
  • Maximum Speed
  • Distance per day
Show More

Product details

  • Boxed-product Weight: 454 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • ASIN: B0028XY7AQ
  • Date first available at Amazon.co.uk: 2 Nov 2009
  • Average Customer Review: 3.5 out of 5 stars  See all reviews (11 customer reviews)
  • Amazon Bestsellers Rank: 24,700 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Product Description

The Knog Nerd 12 Function Wireless Cycle Computers are simple tool-less attachments to your bike's handlebar, frame or stem. This Knog Nerd can be set up for use on two bikes - storing accumulated speed and distance data and maintaining unique data between rides. Cased in industrial grade silicone, the Knog Nerd is 100% waterproof with no signal or function interference. The 12-function model displays current speed, average speed, maximum speed, trip distance, distance per day, total riding time, an odometer, a relative speed gauge, and a 12/24 hour clock. The animated rolling display has a push screen functionality and display backlight. The Knog Nerd also has a low battery indicator.

Features explained

Current Speed

Displays the current speed on the main display when riding. The computer registers up to 199.9 KM/H or 120.0 M/H. (Suitable for wheel diameters of 24 inches and above only). When bike motion stops, speed calculations will continue for 4 seconds to confirm no more wheel signals have been transmitted.

12H AM/PM or 24H Clock

Displays the current time in 12 hour AM/PM or 24 hour format.

TRIP DIST: Trip Distance

0.00–999.99 KM or Miles
Displays the accumulated distance travelled from the last RESET operation.

TIMED TRIP: Riding Time

0:00:00 (H:MM:SS) – 99:59:59(HH:MM:SS)
Displays the total riding time from the last RESET operation. Timing will automatically commence upon riding, and continue to count for 4 seconds after motion has stopped to confirm that no more wheel signals have been transmitted. The additional 4 seconds of counting are then subtracted automatically.

AVG: Average Speed

0.0–199.9 (KM/H) or 0.0–120.0 (Mile/H)
Displays the average speed – calculated from the TRIP DIST divided by TIMED TRIP. This data is accumulated from the last RESET operation. Displays 0.0 when TIMED TRIP is less than 6 seconds and is updated approximately every 1.2 seconds once TIMED TRIP is over 6 seconds. When TIMED TRIP is over 100 hours or TRIP DIST is over 1,000km/miles, the AVG, TIMED TRIP and TRIP DIST will automatically reset to 0.

MAX: Maximum Speed

0.0–199.9 (km/hr) or 0.0–120.0 (mile/hr)
Displays the highest speed recorded from the last RESET operation.

Relative Speed Gauge

A 16 segment gauge displaying the current and average speed as a side-by-side comparison – indexed from the recorded MAX speed. All information is calculated and accumulated from the last RESET operation.

DIST/DAY: Distance Per Day

0.00–999.99 (KM or Mile)
Displays the accumulated distance travelled over a 24 hour period (12am–12am).

T.TIMED TRIP: Total Riding Time (Bike 1, 2)

0:00:00 (H:MM:SS) – 99:59:59(HH:MM:SS), then 100:00 (HHH:MM) – 9999:59 (HHHH:MM)
Displays the total accumulated riding time from the beginning of the computer’s use. T. TIMED TRIP 1 and 2 data cannot be cleared by a RESET operation.

ODO: Odometer (Bike 1, 2)

0–999999 (KM or Mile)
Displays the total distance travelled from the beginning of computer use. The ODO 1 and 2 data cannot be cleared to zero by a RESET operation.

SCAN: Auto Scanning Display Mode

Displays all functions in a looped sequence; automatically updating the display mode every 5 seconds.

Low Battery Indicator

Displays the symbol when the battery charge drops below 2.4V.

Display Backlight

When activated, the display illuminates for 5 seconds each time A is pressed.

Data for all functions is updated approximately every 1.2 seconds.


Customer Questions & Answers

Customer Reviews

3.5 out of 5 stars
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Most Helpful Customer Reviews

15 of 15 people found the following review helpful By Mr. A. Dunsmuir on 19 Mar 2010
Verified Purchase
I did a bit of research on cycle computers and decided to try this one after having used many different brands from the cheapest to the more mainstream offerings.
All have either broken or been lost during use in some way or were not practical.
So far so good with the NERD.
It is very easy to set up, took me 20 minutes as I had two bikes to measure for the wheel sizes. This is very easy and the instructions are some of the most user friendly I have come across.
Initially I thought the unit and sensor look very bulky and awkward but depending on the colour you choose it does actually look good, of course its a matter of taste..
Units are easy to read and the touch screen functionality is robust. It gives a feeling of quality. The casing is silicon and I choose red due to being able to see it in the hedges if it ever comes off.
Accuracy is spot on as with most cycle computers. I measured it over long distance and it was perfect.
Switching between bike one and two on the computer is easy and each bike retains its own wheel size and odometre reading.
The real beauty of this unit is the ease which I can take it off my mountainbike and attach it to my road bike in two minutes. No zip ties or tape nonsense. The silicon straps or belts, are very secure and the sensor has two notches for MTB and road forks. My MTB has Fox 32 forks and it fits nice. A minute later it is on a thin roadbike fork snug as you like.
The only negative I see is the spoke magnet which is poor for round spokes. Has to be tightened too much. This is a minor thing as any magnet will work with the unit. This is hardly worth mentioning though.
It is expensive but I have spent far more getting other units which were cheaper and not so nice to look at.
I recommend this highly!
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1 of 1 people found the following review helpful By jag.64@virgin.net on 10 Dec 2012
Colour Name: BlackSize Name: 12 Function Verified Purchase
This is a great unit. Easy to fit, great visibility. Take some time to set up correctly, but well worth the effort. Once set up, very easy to use.
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Colour Name: RedSize Name: 12 Function Verified Purchase
Having replaced my previous Knog with this one I was very disappointed as it keeps cutting out and stops working. Even more disappointed with Amazon who state I can not return the item or have it repaired! Maybe I will have more success with the manufacturer! And maybe now I will not use Amazon anymore. Disappointing all round.
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By Soos Jay on 10 May 2014
Colour Name: BlackSize Name: 12 Function Verified Purchase
Got this for my boyfriend. He loves it. Really easy to work, and totally waterproof, which they aren't all. It's a bit more pricey than some, but I think it's worth it :)
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By Jason Fairweather on 24 Aug 2013
Colour Name: BlackSize Name: 12 Function Verified Purchase
Wanted to use it with indoor cycle trainer but signal doesn't reach from rear drive wheel to handle bars. Difficult to navigate through menu. Bike frame a little to wide -struggled to fit Nerd on frame.
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Colour Name: WhiteSize Name: 12 Function
Reliable and stylish, happy with purchase. Would buy this brand again (in fact have done so for front light). Used for 6 months problem free
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Size Name: 12 Function | Colour Name: Black