help figuring out maximum front chainring size
#1
Newbie
Thread Starter
Join Date: Oct 2022
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
help figuring out maximum front chainring size
I want to upgrade my bike to a 1x11, with a max 36t rear cassette. I am looking to run the sensah empire pro long rear derailleur, and an 11-36t cassette. What is the maximum size front chainring i can use?
#2
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,671
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 140 Post(s)
Tagged: 1 Thread(s)
Quoted: 5767 Post(s)
Liked 2,541 Times
in
1,407 Posts
What's on the rear has no bearing on chainring size.
So feel free to use whatever you want in front. However, you might need to buy and splice 2 chains, because the typical 112 links will likely be too short.
So feel free to use whatever you want in front. However, you might need to buy and splice 2 chains, because the typical 112 links will likely be too short.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Likes For FBinNY:
#3
I'm good to go!
Join Date: Jul 2017
Location: Mississippi
Posts: 14,953
Bikes: Tarmac Disc Comp Di2 - 2020
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 6178 Post(s)
Liked 4,796 Times
in
3,308 Posts
What FBinNY says is true. However only for 1x. I only point this out so others that don't pick up on the fact the conversation is about 1x don't think this is true for cranks with multiple rings.
Likes For Iride01:
#4
Sr Member on Sr bikes
I would agree that you can go as big as you want for the chainring. However, at some point in size the ring may hit the chain stay as it flares out from the BB to the dropout. Maybe that can be worked around with a BB that has a wider spindle. But then I guess alignment would be out of whack. So I guess the chain stay limits the size. — Dan
#5
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,671
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 140 Post(s)
Tagged: 1 Thread(s)
Quoted: 5767 Post(s)
Liked 2,541 Times
in
1,407 Posts
#6
Clark W. Griswold
Join Date: Mar 2014
Location: ,location, location
Posts: 13,467
Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26
Mentioned: 54 Post(s)
Tagged: 0 Thread(s)
Quoted: 4335 Post(s)
Liked 3,958 Times
in
2,646 Posts
Cool story. The maximum front chainring is going to be the biggest toothed round item that will fit on your bike. It is not determined by the info you have provided but what the bike can handle. Do you know what you are trying to accomplish what sort of gearing you are looking for in the ratios?
#7
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,671
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 140 Post(s)
Tagged: 1 Thread(s)
Quoted: 5767 Post(s)
Liked 2,541 Times
in
1,407 Posts
Question for the OP ...... and a suggestion.
You asked for info re. the largest possible ring, and got relevant answers.
BUT
I'm a bit curious about the why, considering that going to a larger ring works to negate the effect of going to a larger cassette.
As long as you can meet your desired high gear, you could do better with a smaller ring and cassette, ending with a similar low, and tighter mid-range spacing.
You asked for info re. the largest possible ring, and got relevant answers.
BUT
I'm a bit curious about the why, considering that going to a larger ring works to negate the effect of going to a larger cassette.
As long as you can meet your desired high gear, you could do better with a smaller ring and cassette, ending with a similar low, and tighter mid-range spacing.
Likes For FBinNY:
#8
Senior Member
Join Date: Jul 2020
Location: Humboldt County, CA
Posts: 832
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 405 Post(s)
Likes: 0
Liked 430 Times
in
286 Posts
Depending on the bolt circle diameter of the crank, how hard you're willing to look, and how much you're willing to pay, I'd guess that somewhere in the mid-60s is about as big as you can get.
Unless you've got a buddy with a machine shop... in which case, the ground's the limit.
--Shannon
Unless you've got a buddy with a machine shop... in which case, the ground's the limit.
--Shannon
Likes For ShannonM: