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Clydesdales/Athenas (200+ lb / 91+ kg) Looking to lose that spare tire? Ideal weight 200+? Frustrated being a large cyclist in a sport geared for the ultra-light? Learn about the bikes and parts that can take the abuse of a heavier cyclist, how to keep your body going while losing the weight, and get support from others who've been successful.

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Old 07-17-10, 11:15 PM   #1
cooleric1234
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Any tall clydes on the Motobecane titanium frames?

I was thinking of getting one of the Motobecane/Bikesdirect titanium frames. The only thing holding me back were some comments in a recent road forum thread. Someone said the frame has poor geometry at the highest sizes. The claim was that the seat tube angle was too steep, and that the steering would be twitchy as there isn't much trail. Some people also commented that Titanium isn't good for big guys as it tends to flex too much. Any big/tall clydes riding one of these bikes that can comment? I'm 6'5" and 190 lbs.
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Old 07-18-10, 08:36 AM   #2
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I'm not familiar with/don't ride that particular bike, but the head tube angle is the same as my Salsa Casseroll, which has pretty straight forks, and not much trail either. Yes, the steering is a lot faster than my old hybrid, but certainly not unmanageable.

190 pounds? I wouldn't worry about ANY frame material at that weight.

However, the largest frame listed on that website is 59 CM. Do you know if 59 will fit you at 6'5"? One of the problems with buying from a site like Bikesdirect is buying sight unseen; being unable to try it to make sure that it fits.
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Old 07-19-10, 09:27 AM   #3
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I can't tell you about that frame. What I can tell you is that I rode/ tried to race a Merlin Ti bike in 60cm size for about 6 years with no frame failure. In fact the ONLY problem with the frame mat. was I could not pedal it fast enough.

BTW; I weighed about 275 with 6% body fat at the time. And am 6'5"

IMO: Ti bikes rule. They ride great are light as well as durable.
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Old 07-19-10, 09:16 PM   #4
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The question I would ask about the geometry is, "What is it poor for?" I looked and it seems a about like the 80's Italian Crit bikes. But even those were usually steeper at 74/74. That one is close. They are quick handling, but I never thought of them as twitchy or hard to handle. I put in a lot of miles on similar frames, many no-handed, and had no complaints. Right now I'm riding a Motobecane Imortal carbon frame that is a little more slack 72.5/73 an it is very comfortable.
At your size Titanium will be a great frame. It's light, absorbs road shock well, and almost indestructible. Depending on the build, you would probably only notice frame flex in an all out sprint. And even then it should be minimal.
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Old 07-20-10, 01:57 AM   #5
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You sure you didn't mean 290? 6'5" at 190 is skinny.
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Old 07-20-10, 09:47 AM   #6
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I have a 5 year old TI frame road bike (Litespeed) it is a perfectly fine material for larger riders (6'2" 250). I am looking at getting a BD TI frame as well.
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Old 07-20-10, 06:45 PM   #7
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Quote:
Originally Posted by cooleric1234 View Post
I was thinking of getting one of the Motobecane/Bikesdirect titanium frames. The only thing holding me back were some comments in a recent road forum thread. Someone said the frame has poor geometry at the highest sizes. The claim was that the seat tube angle was too steep, and that the steering would be twitchy as there isn't much trail. Some people also commented that Titanium isn't good for big guys as it tends to flex too much. Any big/tall clydes riding one of these bikes that can comment? I'm 6'5" and 190 lbs.
Flex in titanium is an old rumour, kept alive by people who use it to justify spending thousands and thousands of dollars for plastic bicycles that contain small amounts of something called carbon fibre. In reality any frame made out of any material can be as stiff or as flexy as the frame designer wants, by varying the tube diameter, tube thickness, construction method and frame shape. The real question is, is a 59cm frame large enough for a guy who is 6'5"? I am not anywhere near your height, but you should confirm your size by trying some bikes at bike shops to see if 59cm is big enough. The problem isn't seat tube length or stand over height, but cockpit length, if the cockpit is too short, then your into longer stems and that can make steering interesting, in that the bars end up in front of the front axle, making it too easy to get over steer.
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Old 07-24-10, 07:33 PM   #8
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Thanks for the replies. I wasn't thinking straight and posted this right before going to Yellowstone for a week so I've been incommunicado. Yes, I'm 6'5 and 190 lbs. I am pretty sure that the bike would fit, after a bike fitting and experience riding various bikes I've found about a 590-595 mm effective top tube is just about right for me, which this bike has.
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Old 08-23-10, 11:01 PM   #9
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I'm 6'2 and 210 and have ridden the Motobecane Ti for about 3000 miles now. The 59cm frame has a slightly sloping top tube, so it is "virtually" the same as a 61 or 62 would be, as far as top tube length, you just have to raise the seat post 2 more cm. I actually switched out the 110mm stem that came with the bike for a 100 one. It was a pretty simple operation. Otherwise, the bike has a fairly standard geometry I would say. Everyone asks me about stiffness, but it seems plenty stiff to me. Wheels and tires are much bigger factors influencing stiffness and road feel than frame material, IMHO.
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Old 08-26-10, 08:19 PM   #10
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Thanks for the replies. I wasn't thinking straight and posted this right before going to Yellowstone for a week so I've been incommunicado. Yes, I'm 6'5 and 190 lbs. I am pretty sure that the bike would fit, after a bike fitting and experience riding various bikes I've found about a 590-595 mm effective top tube is just about right for me, which this bike has.
Perhaps I spoke too soon. I started looking at geometry a little bit and something dawned on me. The way you set the saddle height and fore-aft adjustment has nothing to do with the top tube length, reach, stem, etc. The knee over pedal spindle method is pretty much just a function of your legs. To me this gives me concern for the seat tube angle (73.5 degrees). I have two road bikes currently (well, one is cross) and both have a seat tube angle of 72.5 degrees. One is a 62 cm bike (cross, so some dimensions are smallish for the size) and another is 64 cm (traditional geometry road bike that is way too big for me). The 62 cm bike has the saddle almost as far back as it needs to go on a setback seatpost. The larger road bike has the saddle in the middle of the rails, but I had to get a really small stem for it to fit. I'm thinking a 73.5 degree seat tube will be too steep and I won't be able to push the saddle as far back as it needs to go.

That gets into what I consider a flaw in the KOPS fitting procedure. It doesn't arrive at a unique solution. Think of this, put your foot in a stable position and keep your knee stable too, then realize it's possible to bend up at the knee and move your butt anywhere along an arc that is equidistant from your knee. That means KOPS really depends on where you start. So, in theory, you could move your saddle up and forward and still have your knee over the pedal spindle. Of course, you won't have a 30 degree angle there, like is recommended. Probably won't be able to pedal on your heel either, so I guess the system works with all those in conjunction.

I know this is an old thread, but does anyone have any recommendations as to whether this bike will fit or not?
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