Short backstory- I have a dusty old Univega Alpina behind the house that I plan to refurb this winter for fire road ramblings, and I recently happend into a listing for a good price on an XT crankset with an unusual ring combo that happens to suit me. While I wasn`t originally planning to spend real money on the project, the thought of cutting some big weight sounded intiguing, so I started weighing up cranks and BBs that I have around the house to see what kind of gram per $ savings I was looking at. What I found surprises me, but I`m not sure if there`s something I`m missing. Since I don`t know for sure what`s included in the weight listings, and I don`t know for sure exactly what`s needed for the outboard bearing setup, what do you folks think?
On the simple side, here`s the XT set I was looking at:
Shimano XT M771 Triple Chainset | Buy Online | ChainReactionCycles.com
I take it the claimed 853g includes bearings and whatever is needed in lieu of cups? Weight aside, is that crankset + BB combo 100 percent complete? Nothing else needed to put it on my bike? I`ve rarely dealt with anything other than cotters and sqare tapers, never with outboard setups, so completely at a loss here.
The not-so-simple part would be figuring what it would cost me for what weight using cranks that I already have with a lighter BB and/or some lighter bolts. The cranks that are on the Alpina are 723g complete with 28-40-48 rings. I also have an old Deore crankset with the same bolt pattern and tooth count as the old Sugino set, but with rings 21g lighter (arms are slightly heavier). So, using the Sugino arms and hardware with the Shimano rings would put me at 702g + BB. By my thinking, for about the same price as the XT set, I could get a Ti BB cartridge and alloy bolts, keeping the old school look (which I prefer) at only about 50-60g heavier. With some ring filing and aluminum ring bolts, I could probably even cut the difference even more. Can that be true?
Some aspects of the BB situation confuse me, so maybe somebody can help here also. White Ind`s site claims 162g for their Ti BBs, but no length listed. I guess that`s for whatever the shortest spindle is? Would it include the bearing weight? Bolts? Anybody know if they list weight for specific length somewhere else on their website?
Phil`s online store pages list weights for each model. Those weights and prices include bearings, but not cups or bolts, correct?
Premium Titanium Bottom Bracket Sets
Google keeps giving me Sinz, which look like a good buy to my uneducated eye, but a search of this subforum turns up very little. Is there some reason you guys stay away from them? What the heck is a "Euro" sqare taper? Same as Campy? These are always seem to come with bolts and cups. Would those parts be included in the weight claims, then?
To be honest, I still haven`t decided if I`m going to spring for a new BB anyway, but looking at them has got me lusting, so I might throw a little "stupid money" that way. I guess could always roll with a BB that I already have and keep a lighter one on my wish list. One more interresting thing I learned while I was weighing up the stuff around my house is that cup-and-cone BBs, UN26, and UN54 all weigh in at very similar weights. There was some (slight) difference in spindle lengths, but I weighed one of each and they spanned between 303 and 320 without bolts. Anyway, that`s my dilema- any related comments welcome.
Results 1 to 6 of 6
Check out hottest mountain bike products from these brands!
See All Interbike Coverage - Click Here »