Gear Calculator

gwowzer · 04-22-2021, 10:54 PM

Can anyone link up a good sprocket sizing calculator? I've done searches and links all seem to be dead.

XLsior · 04-22-2021, 11:18 PM

I had to scale it down to upload.

Megadan · 04-23-2021, 02:49 AM

Gearingcommander.com is still working. The RPS Hawk is on there for sure, and you can alter the tire sizes and other parameters as needed.

BgSkyRider · 04-23-2021, 04:05 AM

https://sprocketcalculator.com

**JerryHawk250** · 04-23-2021, 08:52 AM

https://www.gearingcommander.com/

gwowzer · 04-23-2021, 05:54 PM

I'm running a 17/43 combo at the moment, with a 128 link chain. I was hoping to find a front sprocket to gear down quickly for a trail weekend, without having to change the rear sprocket or chain. Any suggestions? Looks like a 13 front might be ideal ratio wise, but would i need to change the chain if i ran that?

Bill Hilly · 04-23-2021, 06:18 PM

Quote:

Originally Posted by gwowzer

I'm running a 17/43 combo at the moment, with a 128 link chain. I was hoping to find a front sprocket to gear down quickly for a trail weekend, without having to change the rear sprocket or chain. Any suggestions? Looks like a 13 front might be ideal ratio wise, but would i need to change the chain if i ran that?

I would bet that you would be pleased with the performance off road with a 15 front. I have a 42/15 on mine right now, and it takes off really easy everywhere, and will still crawl good enough that you can all but stop without stalling , of course if you were in really choppy ground this wouldn't apply, but for my riding, this combination suits me fine. The bike will still run the speed limit of 55 (about 60 on the speedO).. I tried a 42/17, but didn't like it with my weight, and riding style. A 13 tooth may be a little too slow to be comfortable getting to and from trails.

gwowzer · 04-23-2021, 08:27 PM

Well, what I am trying to achieve is keeping the 17/43 combo 90% of the time, as I like it for the road and most casual off road.
What I want is to gear as low as possible for the occasional weekend I may be doing some heavier off road riding.
And I'd like to just swap the front sprocket, and keep the rear and not change anything with the chain. I was wondering if the 13 would fit that bill or if I have to stick with something with a higher tooth count.

XLsior · 04-23-2021, 08:35 PM

don't know if the bikes wheel/chain tension range could accommodate a 4 tooth shift without altering the chain length.

gwowzer · 04-24-2021, 12:36 AM

Right now as it sits with the 17/43, I probably still have about 1 1/2 of room at the adjustors to bump the rear wheel out. It might be tight, but I think it would tension up ok.
It would be awesome to have both worlds.
I really really like the 17/43 combo for the street and some off road, but would be cool to gear down really heavy for trips with minimal road riding (like camping weekends) where I know over 55 isn't important. Make it a crawling beast with excellent torque.

XLsior · 04-24-2021, 01:28 AM

Front sprockets are relatively cheap. 13t might be the limit of adjustment but if its to much a 14t isn't going to break the bank.

04-22-2021, 10:54 PM	#1
gwowzer Join Date: Aug 2019 Location: Central Ohio Posts: 297	Gear Calculator Can anyone link up a good sprocket sizing calculator? I've done searches and links all seem to be dead.
	0

04-23-2021, 02:49 AM	#3
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,110	Gearingcommander.com is still working. The RPS Hawk is on there for sure, and you can alter the tire sizes and other parameters as needed. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124
	1

04-23-2021, 08:52 AM	#5
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,737	https://www.gearingcommander.com/ __________________ 2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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04-23-2021, 04:05 AM	#4
BgSkyRider Join Date: Apr 2021 Posts: 6	https://sprocketcalculator.com
	0

04-23-2021, 05:54 PM	#6
gwowzer Join Date: Aug 2019 Location: Central Ohio Posts: 297	I'm running a 17/43 combo at the moment, with a 128 link chain. I was hoping to find a front sprocket to gear down quickly for a trail weekend, without having to change the rear sprocket or chain. Any suggestions? Looks like a 13 front might be ideal ratio wise, but would i need to change the chain if i ran that?
	1

04-23-2021, 08:27 PM	#8
gwowzer Join Date: Aug 2019 Location: Central Ohio Posts: 297	Well, what I am trying to achieve is keeping the 17/43 combo 90% of the time, as I like it for the road and most casual off road. What I want is to gear as low as possible for the occasional weekend I may be doing some heavier off road riding. And I'd like to just swap the front sprocket, and keep the rear and not change anything with the chain. I was wondering if the 13 would fit that bill or if I have to stick with something with a higher tooth count.
	0

04-23-2021, 08:35 PM	#9
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,455	don't know if the bikes wheel/chain tension range could accommodate a 4 tooth shift without altering the chain length.
	0

04-24-2021, 12:36 AM	#10
gwowzer Join Date: Aug 2019 Location: Central Ohio Posts: 297	Right now as it sits with the 17/43, I probably still have about 1 1/2 of room at the adjustors to bump the rear wheel out. It might be tight, but I think it would tension up ok. It would be awesome to have both worlds. I really really like the 17/43 combo for the street and some off road, but would be cool to gear down really heavy for trips with minimal road riding (like camping weekends) where I know over 55 isn't important. Make it a crawling beast with excellent torque.
	0

04-24-2021, 01:28 AM	#11
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,455	Front sprockets are relatively cheap. 13t might be the limit of adjustment but if its to much a 14t isn't going to break the bank.
	0