Front rack/bag geometry
#1
Thread Starter
Jet Jockey
Joined: Jul 2005
Posts: 4,941
Likes: 30
From: St. Paul, MN
Bikes: Cannondale CAAD9, Ritchey Breakaway Cross, Nashbar X-frame bike, Bike Friday Haul-a-Day, Surly Pugsley.
Front rack/bag geometry
I've read for years on this forum that many bikes are just not suitable for front racks/bags, but that the Long Haul Trucker (LHT) is almost uniquely suited for it, and might even be better loaded out.
I started to wonder why?
So I went to Surly's website and looked at the geometry. There's nothing out of the ordinary for any non-racing road bike, most cross bikes, and most all the current crop of "gravel" bikes. A very basic and standard road bike 72deg headtube, and 73deg seattube. A very run-of-the-mill 45mm fork rake. The chainstays are a touch long, but nothing else stands out.
Near as I can tell, darn near any bike can be suitable for hauling stuff. There is a mythology around the LHT that just isn't verifiable.
In fact, that 45mm rake fork actually makes the handling twitchier. So...
Upshot is that I'm going to throw a front rack on my Nashbar-frame utility bike. And I don't foresee any issues.
I started to wonder why?
So I went to Surly's website and looked at the geometry. There's nothing out of the ordinary for any non-racing road bike, most cross bikes, and most all the current crop of "gravel" bikes. A very basic and standard road bike 72deg headtube, and 73deg seattube. A very run-of-the-mill 45mm fork rake. The chainstays are a touch long, but nothing else stands out.
Near as I can tell, darn near any bike can be suitable for hauling stuff. There is a mythology around the LHT that just isn't verifiable.
In fact, that 45mm rake fork actually makes the handling twitchier. So...
Upshot is that I'm going to throw a front rack on my Nashbar-frame utility bike. And I don't foresee any issues.
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Good night...and good luck
Good night...and good luck
#2
Banned
Joined: Jun 2010
Posts: 43,586
Likes: 1,380
From: NW,Oregon Coast
Bikes: 8
The Obsessive and subscribers to VBQ tout the Advantages of low trail.. for front loaded bikes
IDK what trail you have ... figure it Out.
Rake is only part of it.. for a Given Head tube angle More rake can reduce the trail ,
so can being a smaller wheel.. since axle line and HTA line cross each other above the ground plane.
IDK what trail you have ... figure it Out.
Rake is only part of it.. for a Given Head tube angle More rake can reduce the trail ,
so can being a smaller wheel.. since axle line and HTA line cross each other above the ground plane.
#3
Senior Member
Joined: May 2014
Posts: 1,532
Likes: 97
Bikes: Working on replacing my stolen Soma Buena Vista Mixte
Hmm. Well I just added a porteur rack to my soma Buena vista (650b). It has mid fork mounting braze ons.
I have ridden with 10-12# loads a few times now. Each positioned slightly differently. Other than being a little harder to get lined up with my kickstand, and a bit more wobbly at take off (when I first get on the bike), it is fine.
I have slight to moderate hills all around. And of course it is a bit harder than unloaded. But not hugely different.
The porteur handles better than my old basket!
I also rode a Dutch style (700c) bike with a front rack and basket. It worked fine as long as the heavy part of the bag was closer to the fork and rack. (Top heavy loads were hardest).
I think being able to mount lower and on the fork is most key for better handling.
I have ridden with 10-12# loads a few times now. Each positioned slightly differently. Other than being a little harder to get lined up with my kickstand, and a bit more wobbly at take off (when I first get on the bike), it is fine.
I have slight to moderate hills all around. And of course it is a bit harder than unloaded. But not hugely different.
The porteur handles better than my old basket!
I also rode a Dutch style (700c) bike with a front rack and basket. It worked fine as long as the heavy part of the bag was closer to the fork and rack. (Top heavy loads were hardest).
I think being able to mount lower and on the fork is most key for better handling.
#4
aka Tom Reingold




Joined: Jan 2009
Posts: 44,163
Likes: 6,383
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
I don't know what formulas, if any, can predict how well a bike handles a front load. You may just have to try it. I used to believe that front loads are always a compromise, but I had a bike long ago that I swear would handle better with a front load than without one. It was a 1975 Motobecane Mirage (low end).
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Tom Reingold, tom@noglider.com
New York City and High Falls, NY
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“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
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