Planet Minis

kball · 02-28-2009, 09:59 AM

I've done a search and found similar engines, but not exactly what I have. 120/90/10 bopper tires, and I want to order some sprockets. This bike's gonna be used for the street only. From what i've read, 17/32 is probably a good place to start, but I don't want to end up buying tons of gears before I find what I like. Should I just get a 30t rear and drop to a 16 front if it's too much on top? Thanks

cdoublejj · 03-01-2009, 09:16 PM

worth a try.

RAZZO · 03-02-2009, 11:23 AM

16t/30t.

fatcaaat · 03-02-2009, 01:15 PM

My GPX177V2 is geared 17/31 on the same size tire as you have. This gearing is a little too short IMO and I think a 17/29 would wind up optional.

Now, I did have a Jialing 157cc in there and 17/31 was about spot on. With only a stock 140, I'd probably tell ya to find a 33t rear sprocket and experiment with the front in 16 and 17 variety.

gav · 03-02-2009, 03:09 PM

16/28

02-28-2009, 09:59 AM	#1 (permalink)
kball PM Newbie Join Date: Jun 2008 Posts: 49	gearing choice for my gpx140??? I've done a search and found similar engines, but not exactly what I have. 120/90/10 bopper tires, and I want to order some sprockets. This bike's gonna be used for the street only. From what i've read, 17/32 is probably a good place to start, but I don't want to end up buying tons of gears before I find what I like. Should I just get a 30t rear and drop to a 16 front if it's too much on top? Thanks

03-01-2009, 09:16 PM	#2 (permalink)
cdoublejj 3rd Gear Member Join Date: Oct 2008 Location: St.Joe MO Posts: 1,367 My Mood:	Re: gearing choice for my gpx140??? worth a try.

03-02-2009, 11:23 AM	#3 (permalink)
RAZZO Old School Z50s Join Date: Jun 2005 Location: NEW JERSEY PINELANDS Posts: 1,968 My Mood:	Re: gearing choice for my gpx140??? 16t/30t.

03-02-2009, 01:15 PM	#4 (permalink)
fatcaaat 3rd Gear Member Join Date: Sep 2004 Location: Arlington, VA Posts: 3,778	Re: gearing choice for my gpx140??? My GPX177V2 is geared 17/31 on the same size tire as you have. This gearing is a little too short IMO and I think a 17/29 would wind up optional. Now, I did have a Jialing 157cc in there and 17/31 was about spot on. With only a stock 140, I'd probably tell ya to find a 33t rear sprocket and experiment with the front in 16 and 17 variety.

03-02-2009, 03:09 PM	#5 (permalink)
gav 2nd Gear Member Join Date: Jan 2008 Location: sydney australia Posts: 394	Re: gearing choice for my gpx140??? 16/28

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)