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Need lots of help with mixing components(5 posts)

Need lots of help with mixing componentsbikejunkie
Dec 6, 2002 7:50 PM
I have an all 105 component group. 105 double crank set up on both my front 52/39 and rear 11-23 8 speed set up. Also hubs are all 105. These are on a road bike frame. Getting a bit old and the hills are killing me so I need some lighter gears hopefully up to 25+ gear inches. Don't intent to get a mountain bike so I thought the best would be a cyclo cross touring bike set up.

I plan to put a Deore LX M571 crank with the BB ES70. Retain the 105 Rear derail FD 1056 and cassette.

Would the correct Bottom Bracket ES70 be 68x118mm?

Please help me figure out what front derail should i get the 105 triple or the LX Bottom Swing Bottom pull.

Thank you very much for the help.
Need lots of componentsThe Walrus
Dec 8, 2002 2:33 PM
I fully understand the "getting old" business and how hills somehow get steeper with time. A few thoughts on dealing with this...

First of all, you're going to need front AND rear derailleurs, in addition to the crankset and BB (and a triple-compatible STI lever, and maybe a new cassette...) With a triple crankset you're going to need a long-cage rear derailleur to deal with the 22T (or so) difference between the big ring and the granny. If you retain the 11-23, you'll need the LX crank to approximate 25 gear inches, but then your top end will suffer. Have you considered a standard (110mm BCD) crank, or even a road triple, with larger chainrings coupled with wider-range cassette? I've done the sort of thing you're talking about twice, once on a VooDoo Wazoo with 48-38-26 rings on a 105 triple, coupled with a 12-28 XT cassette shifted by LX front and 105 triple rear derailleurs, and the other time on a Bianchi Axis with 46-34-24 rings on an LX crank with an 11-30 cassette and 105 triple front and XT rear mechs. Definitely no shortage of climbing gears on either one, plus big enough gears to mash on the downhills and flats.
Need lots of componentsbikejunkie
Dec 8, 2002 4:38 PM
Thanks for the reply.

I would want to copy your set up on your Bianchi Axis. That would be best. You are right I really need the 25 gear inches. No problems with shifters I use down tube shifters. Friction feed for the chain ring and 8 index for the cassette.

Are you happy with your Bianchi Axis? Any technical details. I should be wary off.

Thanks.
Need lots of componentsThe Walrus
Dec 9, 2002 7:00 PM
I've been really happy with the Axis. For an aluminum frame it's very supple; I don't feel like I've been worked over at the end of an all-day ride. The handling is pretty mellow, but definitely not sluggish, as opposed to something quicker like a Jake the Snake. This isn't necessarily good or bad, it's just how this bike is. I guess the bottom line is that it feels good to ride.

Just a heads-up on some parts if you're going this route. I just noticed that CBO (www.cambriabike.com) has some great prices on their sale pages for an RSX triple crank with 46/36/26 rings ($49!) and some 8-sp 11-30 Shimano cassettes (LX and XT). Look around for deals on derailleurs; Nashbar's almost always blowing out something useful. A couple of derailleur notes--get an MTB rear derailleur, as road mechs (even the long-cage versions) aren't meant for than a 27T cog (although you can get away with 28T), and get either a road triple or (preferably) an older bottom-pull MTB front derailleur, which will be a better match for that 46T chainring than the current MTB mechs designed for compact drive.
Need lots of componentsbikejunkie
Dec 13, 2002 12:08 AM
Thanks for the tips. Saw the RSX also but the matching bottom bracket is on beyond bikes. And believe it or not I think I saw the triple front derail for something like $7 I think it was nashbar. But after putting it together I think I will be spending too much on shipping.

So Phase 1 is I went ahead with the front side. Deore LX cranks with matching lx bottom pull bottom swing front derail.

Will keep the old 105 rear derail 12-23 cassette and use the long chain method for my gear shift pattern.

I hope all goes well. If not I will end up with MTB gear train on a road bike frame.

Thanks for all the help

Allan