Converting 3x7 to 1x9 or 1x10

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Converting 3x7 to 1x9 or 1x10

Postby c_man7 » Thu Dec 22, 2016 8:40 am

I'm thinking about converting my v2100 to a 1x9 or 1x10 drivetrain. I rarely ever move up or down from the center chain ring and use the rear mostly to shift. So I figure why not lose the weight. I'm getting new wheels and tires anyway. I want to do this as cheap as possible.

I found a set of wheels/tire on amazon.
26 inch Maddux Mountain Bike Wheels with Kenda Kobra Tires, double walled for $119
Jiankun ixf 170mm crankset w/ bottom bracket $35, (I know it's probably chinesse crap but its got to be better than what I have now.)
34 or 36th narrow/wide chainring $15 (not sure of which
Now here are the diffrences
Shimano H80 9 speed Cassette 11-34th $19
Shimano HG93 9 speed Chain $12
Shimano Deore M591 9 speed Derailleur $32

Shimano H81 10 speed Cassette 11-32,11-34, or 11-35th $20
Shimano HG54 10 speed chain $15
Shimano Deore RD-M610 10 speed Derailleur $20

The price diffrence isn't that big I will also probably need a chain guide or so. But which would be the better option. I mostly ride flat ground and do some trails with hills.
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Re: Converting 3x7 to 1x9 or 1x10

Postby Tomcat65 » Thu Dec 22, 2016 11:09 am

I looked at the same set-ups myself. I really like the idea of the 10 speed's capability to go up to a 42t rear, but the derailleur to handle that large gear is not cheap.
I ended up with a 2x9 set-up.
The reason I chose 2x9 over 1x10 was not just the expense though, I do a lot of hill climbing, or I wouldn't get anywhere around here. The larger rear cogs are a tiny bit heavier than a high quality 9 speed cassette and the weight of the extra shifter for the front derailleur and the second chainring honestly isn't going to make that much difference on a 30lb+ bike anyway. The 9 speed derailleur interchanges with 7 or 8 speed drive, the front derailleur eliminates the need for narrow wide chainrings and chain guides, so, it was a no brainer for me. I can swap a different wheelset with a 7 speed cassette and a 7 speed shifter anytime. The 10 speed cassette locks you into 10 speed. And even then, you have to choose your 10 speed driveline components carefully. The 10 speed components don't all work with all other 10 speed set-ups. I didn't want to be limited that way, because I like being able to change it up.. and the 2x9 is perfect when I need a Save Me gear on the OMG hills

Your results may vary :P
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Re: Converting 3x7 to 1x9 or 1x10

Postby bikesRfun » Fri Feb 24, 2017 8:42 am

I have a 2 x 10 on my 27.5 bike.
It came with 24 - 38 front rings and cassette has a 36 large.
I switched it to 22 - 36 front and I like it.
That 22 front, 36 rear really helps me get up hills near the end of a long ride.
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