48/32 crankset...
#1
Junior Member
Thread Starter
Join Date: Jul 2009
Location: Villa Carlos Paz, Argentina
Posts: 6
Bikes: Hybrid
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
48/32 crankset...
I want to assemble a double crankset chainring 48/32 for a Touring MTB.
Is it possible to change the chainring of a crankset SLX 36/22 into 48/32 and to use it without bashguard?
Or: Is better to try it with a Crankset XT 48/36/26, removing the small one and changing the middle for 32?... Would need bashguard or chainguide?
In any of the cases: Can use a X.9 front derailleur with a double chainring 48/32?
Thanks in advance.
Is it possible to change the chainring of a crankset SLX 36/22 into 48/32 and to use it without bashguard?
Or: Is better to try it with a Crankset XT 48/36/26, removing the small one and changing the middle for 32?... Would need bashguard or chainguide?
In any of the cases: Can use a X.9 front derailleur with a double chainring 48/32?
Thanks in advance.
#2
Senior Member
A 32/48 is a 16 T spread. That's a big spread for one shift, and may produce dropped chains on downshifting, and difficulty/trouble when upshifting.
You don't want to have a dropped chain while riding - I destroyed 4 spokes and a RD when my chain dropped last year.
You don't want to have a dropped chain while riding - I destroyed 4 spokes and a RD when my chain dropped last year.
#3
Senior Member
Join Date: Jun 2008
Location: San Diego
Posts: 204
Bikes: 2006 Bianchi 928 Record and 2002 Bianchi Axis 1x9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
A 16T difference is really not a problem. Compact road cranksets are often 50/34 which is comparable to a 48/32 in tooth drop. If you can locate a 48T and 32T chainring with a 110mm bolt circle diameter, you can use a compact road crankset.
#4
Senior Member
#5
cycles per second
Join Date: Oct 2003
Location: Minnesota
Posts: 1,930
Bikes: Early 1980's Ishiwata 022 steel sport/touring, 1986 Vitus 979, 1988 DiamondBack Apex, 1997 Softride PowerWing 700, 2001 Trek OCLV 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Liked 71 Times
in
48 Posts
Get an XT or SLX 22/32/44, drop the granny and replace the 44 with a 48 like one of these https://www.bikeparts.com/search_resu...p?id=BPC348880 . It's not ramped and pinned but it will still work. I have one on my tourer/commuter. My crank is a 5-arm 94/58mm BCD triple with the granny removed and the outer ring replaced with a 46 so I run 46/32 rings. My crank takes a square taper BB so I was able to get a slightly shorter one for better chain line as a double. Not sure if you can do that with a Hollowtech crank, though.
Or you could get this FSA crank and I think you could replace the bashguard with a 48 ring: https://www.universalcycles.com/shopp...s.php?id=30857
Or you could get this FSA crank and I think you could replace the bashguard with a 48 ring: https://www.universalcycles.com/shopp...s.php?id=30857
Last edited by Gonzo Bob; 07-24-09 at 08:19 AM.
#6
Junior Member
Thread Starter
Join Date: Jul 2009
Location: Villa Carlos Paz, Argentina
Posts: 6
Bikes: Hybrid
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Get an XT or SLX 22/32/44, drop the granny and replace the 44 with a 48 like one of these https://www.bikeparts.com/search_resu...p?id=BPC348880 . It's not ramped and pinned but it will still work. I have one on my tourer/commuter. My crank is a 5-arm 94/58mm BCD triple with the granny removed and the outer ring replaced with a 46 so I run 46/32 rings. My crank takes a square taper BB so I was able to get a slightly shorter one for better chain line as a double. Not sure if you can do that with a Hollowtech crank, though.
Or you could get this FSA crank and I think you could replace the bashguard with a 48 ring: https://www.universalcycles.com/shopp...s.php?id=30857
Or you could get this FSA crank and I think you could replace the bashguard with a 48 ring: https://www.universalcycles.com/shopp...s.php?id=30857
#7
cycles per second
Join Date: Oct 2003
Location: Minnesota
Posts: 1,930
Bikes: Early 1980's Ishiwata 022 steel sport/touring, 1986 Vitus 979, 1988 DiamondBack Apex, 1997 Softride PowerWing 700, 2001 Trek OCLV 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Liked 71 Times
in
48 Posts
Then go with a Deore or XT 48/36/26, take off the granny and get a new 32 middle ring.
#8
Senior Member
Join Date: Oct 2008
Location: Right where I'm supposed to be
Posts: 1,632
Bikes: Franklin Frames Custom, Rivendell Bombadil
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 116 Post(s)
Liked 209 Times
in
127 Posts
If he's limited to Shimano . . . he's gonna have to play the Shimano game. Time for a new crank and who knows what else, depending on his shifting system.
He could however, take off the 48, run it in the middle, and get a 32t 74mm BCD ring. He'd need a longer BB to get a better chainline, and the Q would be larger, but it could be done.
Last edited by Garthr; 07-24-09 at 11:52 AM.
#9
cycles per second
Join Date: Oct 2003
Location: Minnesota
Posts: 1,930
Bikes: Early 1980's Ishiwata 022 steel sport/touring, 1986 Vitus 979, 1988 DiamondBack Apex, 1997 Softride PowerWing 700, 2001 Trek OCLV 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Liked 71 Times
in
48 Posts
#10
Senior Member
Join Date: Jun 2008
Location: San Diego
Posts: 204
Bikes: 2006 Bianchi 928 Record and 2002 Bianchi Axis 1x9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
#11
Senior Member
Join Date: May 2008
Location: Zang's Spur, CO
Posts: 9,082
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 3374 Post(s)
Liked 5,508 Times
in
2,853 Posts
I'm running an XT crank with 48/32/22 and an Ultegra triple FD.
It isn't the quickest shifting arrangement, but it works pretty good.
It isn't the quickest shifting arrangement, but it works pretty good.
#12
Junior Member
Thread Starter
Join Date: Jul 2009
Location: Villa Carlos Paz, Argentina
Posts: 6
Bikes: Hybrid
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
#13
Senior Member
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Posts: 12,257
Bikes: Bianchi, Miyata, Dahon, Rossin
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 5 Times
in
5 Posts
actually the minimum for 110BCD is a 33T, but good luck finding a 33T 110BCD chainring.
the road compacts with 34/50 from shimano/campy/sram work well because the rings are designed for each other. the outer ring has pins and ramps to aid in shifting the huge jump.
shifting is not as good when mixing rings, especially ones with big jumps.
the road compacts with 34/50 from shimano/campy/sram work well because the rings are designed for each other. the outer ring has pins and ramps to aid in shifting the huge jump.
shifting is not as good when mixing rings, especially ones with big jumps.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
#14
Senior Member
Join Date: Sep 2008
Location: Collegeville, PA
Posts: 1,350
Bikes: Ruckelshaus Randonneur, Specialized Allez (early 90's, steel), Ruckelshaus Path Bomber currently being built
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
How about finding a TA Cyclotourist crankset? That's the crank with the greatest ring flexibility out there, but might be hard to find.
#15
Likes to Ride Far
Definitely put a chain retention device (e.g., Third Eye) on the seat tube to prevent the chain from derailling off the inside.