P
Paul Rudin
Guest
NM <[email protected]> writes:
> Tony Raven wrote:
>> Steve Firth wrote:
>>>
>>>> The cyclist could have been travelling at 10mph or less. This is as
>>>> unlikely, as even most trundlies potter about at more than that.
>>>
>>> Most cyclists grossly over estimate their speed, few have speedometers
>>> and none of thsoe are calibrated.
>>
>> I have one and it is calibrated pretty accurately. Few cyclists are
>> travel as slow as 10mph and I am usually between 15-20mph dropping
>> to maybe 8 or 9 on steeper hills. Next?
>>
>
> How did you get it calibrated?
You do it yourself. Put a dab of mark on the tyre, ride a few metres,
measure the gap between the resulting marks and set the computer
accordingly. Very accurate. Car speedos are generally pretty
inaccurate in comparison - most overread by a few percent.
> Tony Raven wrote:
>> Steve Firth wrote:
>>>
>>>> The cyclist could have been travelling at 10mph or less. This is as
>>>> unlikely, as even most trundlies potter about at more than that.
>>>
>>> Most cyclists grossly over estimate their speed, few have speedometers
>>> and none of thsoe are calibrated.
>>
>> I have one and it is calibrated pretty accurately. Few cyclists are
>> travel as slow as 10mph and I am usually between 15-20mph dropping
>> to maybe 8 or 9 on steeper hills. Next?
>>
>
> How did you get it calibrated?
You do it yourself. Put a dab of mark on the tyre, ride a few metres,
measure the gap between the resulting marks and set the computer
accordingly. Very accurate. Car speedos are generally pretty
inaccurate in comparison - most overread by a few percent.