Wide ratio ebike cassette?

Although I am not familiar with your particular bike, I can offer the following general advice.

The easiest thing you can do is change out your front chainring for one with 2 or 3 more teeth which would make it a larger circle and reduce rpm at a given speed in your 13 cog gear in back. The problem is that you also loose leverage in your bigger climbing cogs in your rear cassette. If you live somewhere relatively flat where the hills are not so steep such that you seldom or never required to use the lowest gears, you would be good to go. If, however you really need to go all the way to your lowest gear to make it up the hills where you live and ride, then a cassette change with a larger top gear will help you recapture the climbing ability you lost by putting a larger chainring on up front.

Often making changes to your rear cassette will require changing to a compatible derailleur. If you lack the tools or know how to make these changes your self, you should consult with a tech at a local bike shop to help you sort out the options and the costs before doing anything that will interfere with proper operation of your drive train. There are numerous compatibility issues that need to be sorted and settled before you proceed like proper chain length, derailleur range, hub compatibility with your derailleur Having a good bike mechanic figure out the best and least expensive way to help you achieve higher speeds by gear changes will be money well spent.

I got lucky in replacing my chain ring with one with just two more teeth got me a lower cadence and easier pedaling at higher speed but did not cost me too much climbing power so for $100 (new chain ring and longer chain) I was able to get what I wanted.

None of this changes assist levels. These changes affect what you can accomplish with your legs. A larger chain ring slows your cadence down in each gear on your cassette such that when you are in you smallest and fastest cog, your cadence is reduced to an rmp that is comfortable for you to sustain.
 
You'd need to go to a cassette with 11 teeth in place of the 13 that you have now

Don
That would be nearly ideal if what he has now would allow that. Availability of such a cassette and its compatibility with free hub and derailleur need to be determined.
 
I got lucky in replacing my chain ring with one with just two more teeth got me a lower cadence and easier pedaling at higher speed but did not cost me too much climbing power so for $100 (new chain ring and longer chain) I was able to get what I wanted.

None of this changes assist levels. These changes affect what you can accomplish with your legs. A larger chain ring slows your cadence down in each gear on your cassette such that when you are in you smallest and fastest cog, your cadence is reduced to an rmp that is comfortable for you to sustain.
That would help (a little) with the high speed end of things, but it you also want a better grandma gear for off-road, then you've made that even worse

Adding 2 teeth to the chainring is a much smaller change than subtracting 2 teeth at the cassette - True, it may be cheaper, but depending on what you want to accomplish, it may not do too much

Don
 
That would help (a little) with the high speed end of things, but it you also want a better grandma gear for off-road, then you've made that even worse

Adding 2 teeth to the chainring is a much smaller change than subtracting 2 teeth at the cassette - True, it may be cheaper, but depending on what you want to accomplish, it may not do too much

Don
On my class 3 Cannondale Topstone Neo Carbon 3, with a 11-42 tooth cassette it took my cadence at 26 mph down from around 83 rpm to around 75 rpm a more comfortable cadence for me to sustain over many miles.
 
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Thanks for the info Alaskan and Don. From what you've stated, it seems that going to a front chainring with 2 or 3 more teeth would serve my purposes. I don't expect it will hamper my ability to climb in the lower gears as I've had no trouble negotiating some fairly steep terrain in 4th & 5th.
 
On my Kona Hoss with BBSHD I used a 9 speed 11-46T Sunrace cassette with the KMC ebike chain and the 42T bling ring. Very happy with it so far, climbs hills great but still works well at speed on the flat.
 
I have 2 sets of replacements for the four smallest cogs. I have also installed an Onyx instant engagement sprag clutch hub that goes silent while coasting. I also added the Sram wireless AXS 12 speed derailleur which is just as easy and cool as it seems.
And SRAM just came out with a GX version of the AXS. The upgrade kit retails for $600 - including derailleur, shifter, battery. Use your existing SRAM Eagle cassette, or buy their 10-52 huge range cassette.

I'm really tempted.
 
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