tabrat
Member
You really need to order the Kappa. If you call them they will tell you the Delta is the wrong crank for turbo Levo. I am running the Kappa 155 and it works fine.
Shorter Crank Arms on Levo / Kenevo?
- Thread starter Rob Rides EMTB
- Start date
wrayb
Member
I purchased a set of Miranda Kappa 150mm crank arms. The Q is correct and they DEFINITELY will minimize pedal strikes!!! However...I think they are just too short for me. Anyone have a set of Miranda Kappa155mm cranks and would like to trade? I would also consider the 160mm
Benson
Well-known member
Thanks for the feedback folks, think I’ll return the cranks to Merlin and buy the Kappas. Are the Levo specific ones ok for the 2019 model?
wrayb
Member
Yes, they work great for the 2019. Interested in buying the 150mm Kappa set I have?
Cavi
Active member
I got the Miranda 155 specific for Levo on mine, rode it today , and did not even notice it, just no rock bashes
Benson
Well-known member
Sorry mate, only just saw this, have now ordered the set direct.
HORSPWR
E*POWAH Master
I agree, I bent one like a banana with a pedal strike, I think they're made out of cheese!
I won't be buying them again.
speedkills
Member
Any less cheesey options out there?
Here for example
www.probikeshop.it
Or some ethirteen carbon cranks
Pedivelle HOPE E-BIKE ISIS Viola | probikeshop-it
Acquistare ➤ Pedivelle HOPE E-BIKE ISIS Viola su probikeshop-it. ✓ Consegna expressgratuita ✚ Reso gratuito ✓ Miglior prezzo garantito
www.probikeshop.it
Or some ethirteen carbon cranks
Benson
Well-known member
So I bought the Kappa 150mm cranks and been running them for a while. Initially I thought they were great, and for pedal strike avoidance they really are, but I really notice the higher cadence required for the same level of drive. It feels like my gearing has radically changed so I’m likely going back to the originals.
tabrat
Member
Everyone has the cadence thing backwards. The feel is changing but not the cadence and if anything your feet are slowing and cadence slowing on the same gears. The larger the outside diameter of the circle around the center point you are rotating around the faster speed it must be moving to achieve the same rotation speed as a smaller outside diameter. So what happens is the larger the diameter the easier it is to pedal due to leverage and speed gained per revolution and the smaller the harder it is too pedal due to rotation speed lost and loss of leverage. This is simply fixed by gearing or power assist adjustment but it will not feel the same. Simply put a longer lever exerts more force than a shorter lever with the same input.
The definition of “cadence” or “bicycle cadence” is how many revolutions per minute you make with your cranks. This does NOT change because you change your cranks to shorter cranks however you may feel like you have lost some leverage and are now choosing an easier pedal gear which then changes cadence. You can address this in App by raising the % of power assist let’s say from 50 to 60% or something like that or simply learn to quit mashing on your e-bike. The closer your pedals get to the bottom bracket the slower actual speed they are rotating and your feet are rotating at the exact same cadence as longer cranks but a lower rotating speed.
The physics of this is absolute and cannot be argued however you simply may not like the feel compared to 165 cranks but I personally think that 165s are definitely too long for the low bottom brackets on Levos.
The other thing to consider when going to shorter cranks is what it does to you leg extension and if you need to raise your seat to adjust. Now that is a real issue and a centimeter is something workable for me personally but more might start forcing other adjustments in the cockpit, like stems or spacers, as you start sitting more on top of the bike than in the the bike which is okay for climbing but not descending. Of course that is what dropper seat posts are for.
Personally, I believe the shorter cranks are far superior...but shorter than 155 may trigger other considerations.
The definition of “cadence” or “bicycle cadence” is how many revolutions per minute you make with your cranks. This does NOT change because you change your cranks to shorter cranks however you may feel like you have lost some leverage and are now choosing an easier pedal gear which then changes cadence. You can address this in App by raising the % of power assist let’s say from 50 to 60% or something like that or simply learn to quit mashing on your e-bike. The closer your pedals get to the bottom bracket the slower actual speed they are rotating and your feet are rotating at the exact same cadence as longer cranks but a lower rotating speed.
The physics of this is absolute and cannot be argued however you simply may not like the feel compared to 165 cranks but I personally think that 165s are definitely too long for the low bottom brackets on Levos.
The other thing to consider when going to shorter cranks is what it does to you leg extension and if you need to raise your seat to adjust. Now that is a real issue and a centimeter is something workable for me personally but more might start forcing other adjustments in the cockpit, like stems or spacers, as you start sitting more on top of the bike than in the the bike which is okay for climbing but not descending. Of course that is what dropper seat posts are for.
Personally, I believe the shorter cranks are far superior...but shorter than 155 may trigger other considerations.
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I went for the Hope 155mm cranks, I have to admit I didn't really notice much difference from a pedalling point of view, even with the motor turned off which I regularly do and no more pedal strikes. Would definitely recommend doing it.
Here a short scary update to the Miranda cranks.
After some manuals i had a weird feeling while pedalling. My first thought was the pedal itself, but then the crank broke suddenly. Don't want to imagine, if this happens anybody on a downhill trail... ?
After some manuals i had a weird feeling while pedalling. My first thought was the pedal itself, but then the crank broke suddenly. Don't want to imagine, if this happens anybody on a downhill trail... ?
Last edited:
???
Now I have two good right and two bad left 155mm cranks of the Miranda's.
The first was heavily bent as I touched a log with my foot on the pedal, because I had a bad crank position. For real... only my foot... Neither the pedal, nor the the crank touched it. It hurts a little, but it did not even bleed.
And the second one broke today. Material fatigue?
Who buys cheap, will buy twice. Does anyone need one or two right 155mm cranks? ?
The first was heavily bent as I touched a log with my foot on the pedal, because I had a bad crank position. For real... only my foot... Neither the pedal, nor the the crank touched it. It hurts a little, but it did not even bleed.
And the second one broke today. Material fatigue?
Who buys cheap, will buy twice. Does anyone need one or two right 155mm cranks? ?
Last edited:
Mcharza
E*POWAH BOSS
Nice info, thanks. If I ever change the cranks, have to look Hope's
Wow!.. what a bummer!
I've had good luck with my 155 Miranda's so far....??? had many bad pedal strikes.. but so far so good.
Does hope make 155's now? They only had 170's when they first came out.. if so it's a good ( but expensive! 170€!) Option..
BTW, Did you check your motor shaft? A good friend bent his cranks on a bad landing, and later found his motor shaft bent too! And it ruined his motor.. lucky it was under warranty.
Tim
True, when I got mine they were the only option.. but I'm happy with them.
Tim
Thanks for the tip.
Motorshafts are fine, no problems with them.
Before the crank broke, I've heard some clicks coming from the crank. I could also feel something while pedalling.
So please be careful, if you can hear some weird noise around there.
Did you get the Hopes, and if so what do you think? I'm on a Kenevo expert and am considering the 155mm. I see they do a version specifically for the Specialized Turbo bikes....
Yeah been using Hopes (ebike specific) for a while now and they are awesome. Definitely help with pedal strike and haven't come loose once. Definitely recommend!
That's all the validation I needed to (secretly) spend another ton of cash
Mcharza
E*POWAH BOSS
That's it. The consumption of money is infinite...
Hello Rob,
I'm in the US...are these the proper Miranda cranks for The 2021 Turbo Levo Expert? Thanks!
or this
www.modernbike.com
I'm in the US...are these the proper Miranda cranks for The 2021 Turbo Levo Expert? Thanks!
or this
Samox E3 BR Crank Arm Set - 155mm, Specialized w/BROSE (ISIS Spindle), 0mm offset Right / 5mm offset Left, Black
The Samox E3 forged 6061 Aluminum Crank Arms are a prefect upgrade or replacement for your eBike. BROSE ISIS spindle compatible. <ul> <li>6061 alloy forged arms</li> <li>5mm offset right / 0mm offset left</li> </ul><br/><br/><b>Item Specifications</b><ul><LI>Spindle Interface Type...
www.modernbike.com
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