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That guide looks like it's written by a foreigner of some sort. It comes across as a research paper for a university project or something similar rather than someone that has first-hand knowledge.
Giant, any info about them?
- Thread starter Frankie24
- Start date
Yes, that's was written by a French guy( it was saying something about the law in France.)
Any information about my question before?
It looks like a question for d8veh, trex or flecc haha.
I think you are the ones that are giving me more information about ebikes and how they work( don't be offended everyone else, you are helping me a lot as well)
So, Bosch motor, can have same acceleration or similar to a rear or front motor?
Thanks
Any information about my question before?
It looks like a question for d8veh, trex or flecc haha.
I think you are the ones that are giving me more information about ebikes and how they work( don't be offended everyone else, you are helping me a lot as well)
So, Bosch motor, can have same acceleration or similar to a rear or front motor?
Thanks
The Bosch motor this year has 60NM, 10 more than last year, so this year motor feels more powerful than last year. However, because of gearing, the acceleration depends on which gear you are in. If you select the right gear for the local gradient, the bike feels great, better than ordinary hub bikes, select any other gear, the bike won't be felt as powerful as hub motor bikes. Selecting the right gear is quite instinctive, easy to get right, but it still take a couple of days to be at one with your crank drive bike. Generally speaking (with Bosch crank drives), you can't match the acceleration of the Dapu motor (BH Neos) or the BPM (Big Bear) or the Ezee, these are real beasts with heavy magnets.
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I think you are not completely right.. The bikes I've been looking at have the active line motor, and in bosch website says that this motor has 48 NM, is just the perfomance line the one that has 60NM
(I could be wrong but this is what I found in their website.)
http://www.bosch-ebike.de/en/produkte_neu/performance_line/drive_unit_4/drive_unit_performance.php
http://www.bosch-ebike.de/en/produkte_neu/active_line/drive_unit_3/active_line_drive_unit.php
I was just asking for the acceleration because when I tried the rear motor that acceleration was a good fun, I know that probably after 1month you would lose that feeling.
yes, you are correct on the torque. The torque at the rear wheel of crank drives equals motor torque multiplied by the ratio front angular velocity / rear angular velocity, it varies with the gear you selected and I believe that Bosch bikes feel torquier than last year models, perhaps the small front cog helps. Regarding acceleration, it is a big consideration if the bike can be derestricted, it determines also how steep the bike can climb.
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Hi lads,
As far as I know torque nm means Newton/metres.
The more you have the more powerful is, however I saw that the max torque is bosch active line is 48nm, 60nm in the performance line.
Looks like a big differencebut how is that differenceon practice?
The other thing I saw was the nominal torque which I don't know how much is in the Bosch motors.
Could anyone tell me the torque in bikes like the big bear, bh neo range and some others with the rear or front motor? I just would like to know how much is that 48nm which I think is not that much..
Thanks
As far as I know torque nm means Newton/metres.
The more you have the more powerful is, however I saw that the max torque is bosch active line is 48nm, 60nm in the performance line.
Looks like a big differencebut how is that differenceon practice?
The other thing I saw was the nominal torque which I don't know how much is in the Bosch motors.
Could anyone tell me the torque in bikes like the big bear, bh neo range and some others with the rear or front motor? I just would like to know how much is that 48nm which I think is not that much..
Thanks
http://ebike.ca
go to tools, ebike simulator, select the motor, click simulate.
This tool does not work with crank drive, for crank drives, there is a chart on the Woosh website http://www.wooshbikes.co.uk/?motorcharts
The best known motor is the Ezee.
Maximum torque is about 50-80NM - at the wheel. That's the big difference. If you have the same torque at the chainring, the torque at the wheel will be 50NM * number of teeth on rear cog / number of teeth on chainring. The rear cog is usually smaller than the chainring, typically you have 30-40NM at the rear wheel with a Bosch motor. This is why the Ezee motor is the benchmark motor on e-bikes. The BPM is a little less powerful than the Ezee motor but still gives around 40-65NM at the wheel. Both Ezee and BPM are about a third more powerful than the Bosch Performance.
While you can climb 15% hills while pedalling backward on the Ezee and BPM, you can't do such a thing on the Bosch. These Ezee/BPM bikes consume about 13WH/mile but do not require riders' input.
The Bosch system relies on rider's input.
On eco settings, the rider supplies 70%, the motor 30%, at 20kph, the motor consumes 5.4WH/mile.
On turbo setting, the rider supplies 25% the motor 75%, the motor consumes about 10WH/mile at 25kph.
Bosch bikes suit strong pedallers. Ezee/BPM suit lazy pedallers.
go to tools, ebike simulator, select the motor, click simulate.
This tool does not work with crank drive, for crank drives, there is a chart on the Woosh website http://www.wooshbikes.co.uk/?motorcharts
The best known motor is the Ezee.
Maximum torque is about 50-80NM - at the wheel. That's the big difference. If you have the same torque at the chainring, the torque at the wheel will be 50NM * number of teeth on rear cog / number of teeth on chainring. The rear cog is usually smaller than the chainring, typically you have 30-40NM at the rear wheel with a Bosch motor. This is why the Ezee motor is the benchmark motor on e-bikes. The BPM is a little less powerful than the Ezee motor but still gives around 40-65NM at the wheel. Both Ezee and BPM are about a third more powerful than the Bosch Performance.
While you can climb 15% hills while pedalling backward on the Ezee and BPM, you can't do such a thing on the Bosch. These Ezee/BPM bikes consume about 13WH/mile but do not require riders' input.
The Bosch system relies on rider's input.
On eco settings, the rider supplies 70%, the motor 30%, at 20kph, the motor consumes 5.4WH/mile.
On turbo setting, the rider supplies 25% the motor 75%, the motor consumes about 10WH/mile at 25kph.
Bosch bikes suit strong pedallers. Ezee/BPM suit lazy pedallers.
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Great!! That's sound like perfect for me! I am not a good rider or whatsoever, however I am 25 and I have some fitness and I love sports. Main reason of an ebike was that if I am little bit tired I can get some more help to don't have the crazy pain I used to have in my legs.
Also because of the importance of using the right gear I find it can be good fun once you get how to do it.( something like compare automatics cars with manuals, first are comfy and good but if you really like cars you can enjoy more the manual one)
Also I don't really like throttles maybe because I never used before, maybe I am afraid of getting lazier hahaha.( I know they are very good and if you get an injury or something are great, hope this won't happen
I will be happy to keep myself under 70-75 hahaha.
I know in few years I'll maybe change my way of thinking but at the moment for me a bike is a bike which you should pedal(probably lot of people won't agree with me)
After all this I think I am ready,
I will try to order tomorrow the cube hybrid reaction pro 29, I hope I won't regret
A lot of members have MP+ (me too):
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_569675_langId_-1_categoryId_242553
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_569675_langId_-1_categoryId_242553
yes, they do 700C x 38:
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_569615_langId_-1_categoryId_242553
No, you can't add a throttle to a Bosch bike.
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_569615_langId_-1_categoryId_242553
No, you can't add a throttle to a Bosch bike.
So injures are forbidden hahaha.
It shouldn't be a problem to climb a 10% hill with that motor right?
Now under everyone's experience here is the thing:
I can get the cube 2099 with mudguards, lights, the tyres, and maybe gloves helmet and rack for the car with lifetime free service. In the other hand trough the cycle to work scheme I could get it for 1800€ but without all those things and the shop is 3,5 hours from Dublin, I think is better to spend more and get closer and all those things, what's your opinion?
It shouldn't be a problem to climb a 10% hill with that motor right?
Now under everyone's experience here is the thing:
I can get the cube 2099 with mudguards, lights, the tyres, and maybe gloves helmet and rack for the car with lifetime free service. In the other hand trough the cycle to work scheme I could get it for 1800€ but without all those things and the shop is 3,5 hours from Dublin, I think is better to spend more and get closer and all those things, what's your opinion?
I hope so, I will be happy if I can have some fun and enjoy some long travels without that pain and the extra power I get from the bike. As soon as I get I will go around to try and make some kind of review or opinion about it.
What about the chance of getting cheaper? It is worth it or better having a 100% good support ?
I spoke with a guy from greenaer(another shop in Dublin) he told me to take care about the after sales and asked me for the shop, then I got a reply from them; you can buy in peace they are good guys..
I don't think he gets something by telling me that..
I know it depends on the rider but what do you think it can be the max gradient I could ride with some effort? I mean without die hahaha
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