Addiction LXXVIII
#1526
serious cyclist
Join Date: Apr 2009
Location: Austin
Posts: 21,147
Bikes: S1, R2, P2
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#1527
Senior Member
Join Date: May 2010
Location: Bristol, R. I.
Posts: 4,340
Bikes: Specialized Secteur, old Peugeot
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299 Posts
There is a possibility, not likely but still a possibility, of a manufacturing defect somewhere. I raise that possibility because my bike when new had a similar sketchy feel and pulled to the left. After detailed investigation with carpenters level and string I found the front and back wheels were not plumb. The dropouts were not inserted correctly with the result that the axles were not horizontal. A bit of very careful work with a round file fixed the problem. This is not the case with your bike as it was fine before the wheel change. But don't assume new wheels from a known manufacturer are built perfectly.
#1528
Administrator
Thread Starter
Join Date: Apr 2005
Location: Hudson Valley, NY
Posts: 33,392
Bikes: Merlin Cyrene '04; Bridgestone RB-1 '92
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Where else but the internet can a bunch of cyclists go and be the tough guy? - - jdon
#1529
Super Modest
Join Date: Jun 2002
Location: Central Illinois
Posts: 23,838
Bikes: Trek Domane+, Trek Emonda, Giant Propel, Colnago V3, ICE VTX WC
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2,310 Posts
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Keep the chain tight!
#1530
Mostly Harmless
Join Date: Jul 2008
Location: At Large
Posts: 57,071
Bikes: Have two wheels
Liked 4,938 Times
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2,648 Posts
#1531
Coffin Dodger
Join Date: Mar 2013
Location: New Hampshire
Posts: 2,138
Bikes: Motobecane Vent Noir, Lynskey R345, Serotta Nova Special X
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Okay, guys. Here's where I admit what a total wuss of a nervous, incompetent, old man I am.
As some of you know, I recently acquired a super-nice set of wheels. They are about 1440g, 35mm deep and I have 25mm GP5000s mounted on them. They are noticeably faster than the decent set I was riding before, but I have one complaint. To wit, they scare the snot out of me descending on rough pavement and/or gusty winds. Yesterday, I had a big tailwind on the homeward leg and had a bunch of 30 mph stretches in the drops where I wondered whether I was going to be able to hold it together and stay out of a death wobble. Some of this was clearly mental and went away when I reset my position, shifted weight aft, and relaxed my arms, but I've never had it so bad with any other set of wheels. My inclination is to work on the mental part with progressive exposure, but I am also concerned about the risk. Any helpful suggestions? Anyone think 28s would help?
As some of you know, I recently acquired a super-nice set of wheels. They are about 1440g, 35mm deep and I have 25mm GP5000s mounted on them. They are noticeably faster than the decent set I was riding before, but I have one complaint. To wit, they scare the snot out of me descending on rough pavement and/or gusty winds. Yesterday, I had a big tailwind on the homeward leg and had a bunch of 30 mph stretches in the drops where I wondered whether I was going to be able to hold it together and stay out of a death wobble. Some of this was clearly mental and went away when I reset my position, shifted weight aft, and relaxed my arms, but I've never had it so bad with any other set of wheels. My inclination is to work on the mental part with progressive exposure, but I am also concerned about the risk. Any helpful suggestions? Anyone think 28s would help?
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#1532
he said member
Join Date: Sep 2008
Location: is everything
Posts: 13,802
Bikes: yes please
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#1533
he said member
Join Date: Sep 2008
Location: is everything
Posts: 13,802
Bikes: yes please
Liked 1,951 Times
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1,207 Posts
Its spooking you because speed wobble is friken scary, and hitting the ground at 30 mph is not fun.
#1534
serious cyclist
Join Date: Apr 2009
Location: Austin
Posts: 21,147
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#1535
Senior Member
Join Date: Jan 2010
Location: TC, MN
Posts: 39,521
Bikes: R3 Disc, Haanjo
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4,673 Posts
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#1536
he said member
Join Date: Sep 2008
Location: is everything
Posts: 13,802
Bikes: yes please
Liked 1,951 Times
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1,207 Posts
#1537
Should Be More Popular
Join Date: Dec 2007
Location: Malvern, PA (20 miles West of Philly)
Posts: 43,643
Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix
Liked 9,572 Times
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4,426 Posts
Busy day of telemedicine, that’s why I am late.
MoAlpha agree drop your PSI and relax. Should improve with a few more rides.
MoAlpha agree drop your PSI and relax. Should improve with a few more rides.
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#1538
VFL For Life
Join Date: Feb 2005
Location: Knoxville, TN
Posts: 52,249
Bikes: Velo Volmobile
Liked 2,064 Times
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1,444 Posts
datlas in a flash of brilliance today I conceived of an invention for you and your ilk: a handlebar mount to hold your device so you can do tele-medicine consultations whilst riding.
How big do you figure the market is for such a product?
How big do you figure the market is for such a product?
#1539
Should Be More Popular
Join Date: Dec 2007
Location: Malvern, PA (20 miles West of Philly)
Posts: 43,643
Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix
Liked 9,572 Times
in
4,426 Posts
#1540
Should Be More Popular
Join Date: Dec 2007
Location: Malvern, PA (20 miles West of Philly)
Posts: 43,643
Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix
Liked 9,572 Times
in
4,426 Posts
datlas in a flash of brilliance today I conceived of an invention for you and your ilk: a handlebar mount to hold your device so you can do tele-medicine consultations whilst riding.
How big do you figure the market is for such a product?
How big do you figure the market is for such a product?
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#1542
VFL For Life
Join Date: Feb 2005
Location: Knoxville, TN
Posts: 52,249
Bikes: Velo Volmobile
Liked 2,064 Times
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1,444 Posts
#1543
Mostly Harmless
Join Date: Jul 2008
Location: At Large
Posts: 57,071
Bikes: Have two wheels
Liked 4,938 Times
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2,648 Posts
#1544
Super Modest
Join Date: Jun 2002
Location: Central Illinois
Posts: 23,838
Bikes: Trek Domane+, Trek Emonda, Giant Propel, Colnago V3, ICE VTX WC
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2,310 Posts
#1545
Senior Member
Join Date: Sep 2005
Location: In the foothills of Los Angeles County
Posts: 26,279
Liked 10,208 Times
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4,951 Posts
There have been threads on wobbling and many times there is no apparent reason discovered. It seems that certain combinations of bike/wheel/rider sets up a frequency that causes a wobble.
I had a friend who had a Miele with a wicked death wobble and nothing he did would stop it so he got rid of the bike. I've never had a speed wobble on a bike. Lucky me.
#1546
he said member
Join Date: Sep 2008
Location: is everything
Posts: 13,802
Bikes: yes please
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Oh yeah!
Friken sweet. Nothing like some good fitting footwear.
Friken sweet. Nothing like some good fitting footwear.
#1547
serious cyclist
Join Date: Apr 2009
Location: Austin
Posts: 21,147
Bikes: S1, R2, P2
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2,028 Posts
If I need a sponsor, it's for chocolate.
#1548
Silver Comet Fred
The Ardennes+ I had before let the 25s expand to a measured 28 and I was able to run them quite a bit softer. That was very confidence inspiring, but the wheels were appreciably heavier too. Maybe I'll drop the pressure in the GP5000s 5 psi and see if they behave a little less sketchy.
#Nascar
#1549
Senior Member
Join Date: Jan 2010
Location: TC, MN
Posts: 39,521
Bikes: R3 Disc, Haanjo
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4,673 Posts
#1550
serious cyclist
Join Date: Apr 2009
Location: Austin
Posts: 21,147
Bikes: S1, R2, P2
Liked 3,685 Times
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2,028 Posts