I don't think it would at all. (if Ltd to 250w be useless on your hills)

I have a power meter built into my Giant Fathom and agreed it does occasionally see well above 250 w (most I, ve see n is 607 w) but that is when I, m going almost bonkers, spinning crank at 110 rpm on steep prolonged hills. (in Derbyshire) If I take it steady and keep cadence around 70,I can easily (steadily) climb any hill and power reading stays below 250.

And, I, d guess I, m amongst heavier riders at 105kg and certainly not fit taking my AF into account.

Look at it from your battery's point of view. I get over 2 hours hard riding even on my 400 wh battery. That's well under 250 w average. I, ll up load some power /cadence graphs... It actually amazes me how much help even 200w actually gives.

I think current rules /legislation is fine. My pedelec legal mtbs do fantastic job. All of them.

[ATTACH type=full" alt="Screenshot_20221002_095614_com.GiantGroup.app.RideControl2.jpg]49029[/ATTACH]

 

That 283 w max corresponded to a cadence of 103..You can see from graph nearly all climbing is done well under the 250 w threshold.

 

Lots of ebikes are well below 200Wh use per hour in fact some ebikes only come with 200Wh batteries or close to it and could be used beyond 2 hours. Other ebikes may have regen so they effectively pull less from the battery over time as they are topping the battery up on rides. I think a simple 250W rating should allow perhaps for 500W peak and that's it, a fair level applied to all manufacturers. Perhaps up to 1 minute of 500W peak power and perhaps a second or two up to 600W. Nice simple legislation easy to understand which all motor systems can adhere to. For those who only use ebike power for the hills and ride conventionally on flats and downhill use very little power and many of those ebike are very lightweight sub 20kg models. You would expect a motor rated to 250W to use less than 250Wh over an hour because on a ebike its not used all the time. Looking at the chart below taken from Grin if you were climbing on a direct drive hub motor ebike for a whole hour going up a hill of 15km in length at 15km/h you would use 210Wh or be averaging 210W (28Wh x 7.5 ). I've used the right column as the energy consumption x7.5 as the hill is 2km long. You could literally climb a hill for 2 hours (30km) with a 420Wh battery. Ok maybe 440Wh battery allowing for the reserve capacity that batteries hold. If you only use the motor for hills and regen downhills you could be riding that direct drive hub motor practically all day with an average Wh consumption that is well below 100Wh.

 

In defence of the EU's rules... well, a little bit at least:

 

In [mention=18796]Sturmey[/mention] 's link, there is an onward link from the pedelec standard to a pre-existing motor test standard. They are not going to write another motor test standard when something already exists, so its use is understandable.

 

But it is used in a way its writers would not have anticipated. The 'maximum 20K temperature rise' criterion is there so that a motor sold for continuous operation (use class S1) is guaranteed to have at least its claimed power, i.e. 'not less than claimed'.

 

In pedelecs we are interested in 'not more than claimed'.

By the way, there is an argument thats its better to leave things as they are. These complicated rules can be said to work in favour of the user who wants a bit of extra power.. Any revision could result in a further restriction of power and make it easier for law enforcement. From a road safety/enforcement point of view, the 25 km/hr limit in practice (in non hilly areas) limits the useful power anyhow and many people living in hilly areas need any additional power they can get.

Edited October 3, 20223 yr by Sturmey

https://www.ebay.co.uk/itm/255338237388?hash=item3b73584dcc:g:dcsAAOSwt1ph5lfy&amdata=enc%3AAQAHAAAA4Py9522UaOzaOUM%2BKM8aEwekeZmDDqcprzZOC1v9SYDXC5uGBH1FoGdZZq3NiSbwtEh88MxFRmrmqbwzrPW0xcjP%2Bj5eFy1fSU0pIQn2MFpiNd4L9qHgWLQuzCcc6pYavzykG5BRtFwy4MHIrVOJxoLHoCDIbl6T58PaQ6uNwyHTGo1LcWt7TMUXfxT%2BLFCZCuV68kOmL3pFS7RsoI7Ai5s6lXh%2FOx7o3iFraL9DAJUeMz26Mis6IgjQYo2X6D7%2BxEl%2BfKZ%2Fmvd5%2BRasbL%2FNANqQL%2FM95uNGrh8mTObhZ2Xt%7Ctkp%3ABk9SR6L9r8HyYA

 

Cool are these sheepskin earpads... don't get hot, they look cool, sound cool and feel cool. There's an extra layer of foam which is integral, which I hope won't alter these Senn's acoustic properties - they sound the same to my ears so far, so perhaps not. My only reservation in recommending them, is that the sponge filling doesn't feel as dense as Sennheiser's own. The sponge filling will wear down but the leather won't for several years - I could cut in and replace just the foam I guess. Or fill with slime or go foamless, because that seems to be the MTB way.

 

https://www.amazon.co.uk/Replacement-Sennheiser-Headphones-Sheepskin-Cushions/dp/B07G5X8YD9/ref=

there cheap enough to try them but at least there in the uk and not in Germany with there rip off postage prices.

By the way, there is an argument thats its better to leave things as they are. These complicated rules can be said to work in favour of the user who wants a bit of extra power.. Any revision could result in a further restriction of power and make it easier for law enforcement. From a road safety/enforcement point of view, the 25 km/hr limit in practice (in non hilly areas) limits the useful power anyhow and many people living in hilly areas need any additional power they can get.

 

I can't agree with that, I really don't like the ebike laws in the UK that are from EU legislation. I feel we need to do our own legislation which is much fairer and the plain english campaign would approve of. We need to get more people out of cars and this means reliable low cost ebikes with good functionality. I totally agree with the 15.5mph speed limit but need more power for hills and easy throttle control but I do believe ebikes should be weight limited that share paths with normal bicycles and pedestrians. I personally think we need to move away from proprietary technology too that create restrictions in component supply and repairs so at the very least clear warnings of future costs and likelihood of being uneconomic to repair and sent to landfill.