Triple for an Ironman?
03-05-20, 01:45 PM
#26
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03-05-20, 05:02 PM
#27
Death fork? Naaaah!!
RD 3500:
Obviously the Biopace chainrings aren't original.
The BB for GPX is 117mm while the length of your 105 BB would be 113mm.
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Obviously the Biopace chainrings aren't original.
The BB for GPX is 117mm while the length of your 105 BB would be 113mm.
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(looking for a picture and not seeing it? Thank the Photobucket fiasco.PM me and I'll link it up.)
03-05-20, 07:04 PM
#28
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My IM has the original 105 set on it. I am willing to acquire just about anything in order to make it a little better for hills. I'm not a downhill speed junkie, too old for that. I like the aesthetics of the compact double but am drawn to the versatility of the triple. That R3000 Sora is tempting.
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03-06-20, 12:54 AM
#29
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03-06-20, 12:56 AM
#30
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03-06-20, 03:20 AM
#31
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Another option:
if your freewheel has an 11-tooth sprocket, I bet you could use an old triple crankset minus the big ring.
That would give you something akin to the ‘sub-compact’ that is all the rage.
I have just done this, and have 7-speed at the back (12-20 or 12-25) with a 42/30 crankset.
I replaced the chainring bolts and nuts for singlespeed ones.
if your freewheel has an 11-tooth sprocket, I bet you could use an old triple crankset minus the big ring.
That would give you something akin to the ‘sub-compact’ that is all the rage.
I have just done this, and have 7-speed at the back (12-20 or 12-25) with a 42/30 crankset.
I replaced the chainring bolts and nuts for singlespeed ones.
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03-06-20, 06:07 AM
#32
Death fork? Naaaah!!
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You know it's going to be a good day when the stem and seatpost come right out.
(looking for a picture and not seeing it? Thank the Photobucket fiasco.PM me and I'll link it up.)
You know it's going to be a good day when the stem and seatpost come right out.
(looking for a picture and not seeing it? Thank the Photobucket fiasco.PM me and I'll link it up.)
03-06-20, 07:18 AM
#33
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That's a tough combo to beat, especially when you have something like a 12-28 on the back. BTW, if people are looking for Biopace rings, Sakae made the OvalTech and Sugino made the Cycloid. There are plenty of those sitting on the dock of E bay.
For the OP, here is a gear calculator to help with your choices.
Mike Sherman's Bicycle Gear Calculator
For the OP, here is a gear calculator to help with your choices.
Mike Sherman's Bicycle Gear Calculator
