General Discussion / Re: Trek Portland
« on: October 29, 2010, 10:14:04 pm »Thanks for your good advice,
Best,
Neil
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Neil from Brookline, MA
*I had a professional fitting performed & retain the measurements of the fitter. I am 5'10". The fitter recommends I use a top tube with a length of 55.
**The T1/T2 top tubes are 22/55.9 in length.
I had to go to the 2009 Cannondale archive to find the specs for the Touring bikes. Do they make 2010 Touring bikes? The top tube is 55.9cm horizontal. This is the same size as the current CAAD8 and CAAD10 56cm size frames. So ride one of them in 56cm and you will have about the same size bike as the Touring size Large. Seat tube angle is 73.5 on the CAAD and 73 on the Touring. Close enough. Head angle is different but that just affects steering, not reach.
Personally I think the size Large or 56cm CAAD with a 56cm top tube is the right size for you. The fitter's recommendation of 55cm top tube is short for a 5'10" man. If you are normal proportions of trunk, arms, legs, the 56cm top tube is the right size for you. I am 5'11" and use 57 or 57.5cm top tubes and 12cm stems. Lance Armstrong is 5'10" and used a 58cm Trek with a 57cm top tube and 11cm stem. Granted you are not Lance, but a good fit is fairly uniform. You should be able to ride another 5'10" person's frame in comfort. With a few minor changes such as 1-2cm different stem, 1-2cm more or less stem spacers, 1-2cm saddle forward or back on the rails, saddle up or down 1-2cm. All minor changes easily made that don't affect the handling of the bike. All assuming you have normal body proportions for a 5'10" person. If you have a 36" inseam or 24" inseam, and 5'10", then things are different.
I'd do a dealer search on Cannondale's site. Then, start calling shops. There's no reason to be loyal to your LBS, as they aren't willing to earn your business. If a shop is worthwhile, they'll order it without coercing you into buying it.Hi,
BTW, I bought my last bike from a shop that's 4-1/2hrs away. The "local" shops that carry the brand are worthless, so no reason to patronize them.
I did not get a Trek 520 for a similar reason, a few years back. <rant on>Why, oh why, don't bike shops stock touring bikes?? <rant off>
I don't honestly know what's closest to a T1/2 in Cannondale's lineup. I'd suggest, though, that you might want to negotiate a bit with the shop. I sort of wish I had taken my LBS's best offer, which was that they'd order it with the understanding I would buy it unless they couldn't get it to fit. If you can get that sort of deal, then the onus is on them to make it fit. Really, there's only a few things they can do to correct a fit. (1) Raise or lower the seat. (2) Slide the seat forward or back. (3) Change saddle tilt. (4) Change out the stem. Make dead certain you have a deal with the shop to swap the stem, if that's needed, before you order the bike.
Note that the feel of the bike is going to change when you load it up, so to some degree, you have to pick something you think will be good and adapt to it.
Also, some REIs have carried Cannondale tourers on and off. If there's a few in your neck of the woods, you might want to call around and test ride them if they have them.
I would try that with one of the big chain stores, small local shops may not have the clout to turn it back in or move it should it not be right for you. Big stores can ship it off to another shop if needed.
Did you peruse the FAQ on BikeSmith's site? They have some good comments, as follows:
What size chainrings should I get?
If you are getting spun out in high gear now, using the same gears with the shorter arms may fix this. For most riders, dropping 4 or 6 teeth on each ring seems to work well. If you currently use low gear far more often than high gear, you will want to use even smaller chainrings and/or a bigger cassette.
Most people with 26" drive wheels are going from 30-42-52 to 26-36-46 or 24-34-44. Faster riders are using 24-39-48. A few have gone to 22-34-42.
When I shorten Shimano 105s & Ultegras, about 1/3 of the owners have me install 24-39-48 FSA ramped and pinned rings to replace the stock 30-42-52 setup. Cost = $84
It's not unanimous, but a large majority of riders with 20" drive wheels and shorties do well with standard "Road Triple" gearing of 30-42-52.
http://bikesmithdesign.com/Short_Cranks/short_cranks_faqs.html
The most versatile gearing would be the 48/38/28 with the 24T granny substitution for the 28.
What you haven't told us is what cassette gearing you are going to use as that has a major effect on overall gear range too. An 11x34 or 12x23 are far different.
That doesn't seem right: are you sure you understood Mel at Tandems East correctly? The shorteners have several holes drilled at different lengths to allow for a child's growth (that's what they are usually used for on tandems). Indeed, the website says: "Shortens the crank length by 24mm, 41mm, 59mm & 76mm. Reduce cranks by 3” at the max." Just look at the pic on their website and you'll see what I mean.Hi
I finally had a chance to call Tandems East today. I thought the reply would be of general interest to the list. According to the vendor, the way crank arm shorteners work is that they effectively cut the crank arm length in half. So if you have 175 mm crank arms now, the crank arm shorteners will produce a 87.5 mm crank arm. For my purposes, that is too low.
Thanks,
NeilIf you want to try shorter cranks without initially investing in new cranks, you could use crank shorteners that bolt onto your existing cranks. These are commonly used on tandems to allow shorter (child) stokers to pedal, but would also work for what you want. An additional benefit is they will allow you to try different lengths to see what works best for you.
See http://www.tandemseast.com/parts/cranks.html#Crank%20Shrotners
If you want to try shorter cranks without initially investing in new cranks, you could use crank shorteners that bolt onto your existing cranks. These are commonly used on tandems to allow shorter (child) stokers to pedal, but would also work for what you want. An additional benefit is they will allow you to try different lengths to see what works best for you.
See http://www.tandemseast.com/parts/cranks.html#Crank%20Shrotners
Another option I forgot to mention is to have cranks custom-shortened. There's a guy on the Web that offers this service. I haven't used him myself, although I've heard good things from others in the tandem community.
See http://bikesmithdesign.com/Short_Cranks/shorten.html
Brian