Lifting front wheel.

Anything specific to off-road riding.
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cycleruk
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Lifting front wheel.

Postby cycleruk » 30 Mar 2018, 2:20pm

Mentioned in another topic, and thinking it more prudent than rather reply there, so I would do a separate post.

hercule wrote:
"There is a handling issue that I've never really got to grips with, namely that on steep climbs its very difficult to keep the front wheel on the ground, which does nothing for my confidence."

The technique for stopping the front wheel lifting on steep gradiants - lower your elbows so that the forearms are parallel with the ground.
Obviously this causes you to bend forwards but has the effect that you pull back on the bars rather than lifting them if you stay upright.
Naturally, on a steep section, sitting upright, you will pull on the bars to get more force into your legs but then this encourages the front to lift.
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reohn2
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Re: Lifting front wheel.

Postby reohn2 » 30 Mar 2018, 2:31pm

Front wheel lifting when climbing steep hills could also be caused by short chainstays(26in wheels and tight clearances),long thighs necessitating greater saddle layback,short front centres and or a short stem.
One or all of these things won't help as they put most weight over the rear wheel and in doing so lighten the front end :?
To add to Cyleruk's post ,thinking "round and even" when pedalling will also help
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LinusR
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Re: Lifting front wheel.

Postby LinusR » 30 Mar 2018, 5:35pm

Also riding in a very low gear will tend to lift the front wheel. Lean forward and pedal smoothly the hardest gear you can manage.

hercule
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Re: Lifting front wheel.

Postby hercule » 30 Mar 2018, 10:23pm

Tried them all but it still happens!

The bike in question (a GT Avalanche) has particularly short chain stays, but also owing to a dodgy neck there are limits to how low I can lean over the bars. There's a section of road round here which almost invariably causes the wheel to come up, yet I can ride up it on all my other bikes without any problems, so I suspect it is something specific to the machine.

reohn2
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Re: Lifting front wheel.

Postby reohn2 » 30 Mar 2018, 10:33pm

Check the geometry of the Cannondale your thinking of buying against your GT.
The Genesis Longitude is particularly well behaved climbing :)
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freeflow
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Re: Lifting front wheel.

Postby freeflow » 30 Mar 2018, 11:30pm

You need even smaller gear inches to minimise the torque you apply which is causing the front wheel to lift. You'll just have to accept pedalling at 100 rpm with a 15 inch gear to gobuphill at just over 2mph <big tongue in cheek grin>

hercule
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Re: Lifting front wheel.

Postby hercule » 1 Apr 2018, 4:24pm

freeflow wrote:You need even smaller gear inches to minimise the torque you apply which is causing the front wheel to lift. You'll just have to accept pedalling at 100 rpm with a 15 inch gear to gobuphill at just over 2mph <big tongue in cheek grin>


This opens another can of beans... despite spinning happily at 100 rpm in medium gears (say 50"+) I really struggle to spin in low gears and seem only to be able to maintain 60-70 rpm. That's even on my recumbent trike, where there's no risk of falling off. Maximum cadence seems to be proportional to gear inches, in my experience (or maybe that's just me). At the other end of the spectrum I've hit 140 rpm descending a local hill in top gear on the trike (that got me up to about 40mph, I think)

MikeDee
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Re: Lifting front wheel.

Postby MikeDee » 1 Apr 2018, 7:53pm

Maybe your saddle is too far back.


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Username
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Re: Lifting front wheel.

Postby Username » 9 May 2018, 9:16pm

LinusR wrote:Also riding in a very low gear will tend to lift the front wheel. Lean forward and pedal smoothly the hardest gear you can manage.


In a harder gear you will have to push the pedals harder, so there will ultimately be the same amount of torque in the rear wheel. Shifting your weight forward and being as smooth as possible with the pedalling is the best bet. If a hill is that steep there will always be a battle to keep the front wheel down.

PDQ Mobile
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Re: Lifting front wheel.

Postby PDQ Mobile » 9 May 2018, 11:46pm

Username wrote:
LinusR wrote:Also riding in a very low gear will tend to lift the front wheel. Lean forward and pedal smoothly the hardest gear you can manage.


In a harder gear you will have to push the pedals harder, so there will ultimately be the same amount of torque in the rear wheel. Shifting your weight forward and being as smooth as possible with the pedalling is the best bet. If a hill is that steep there will always be a battle to keep the front wheel down.


Except on a recumbent! It's not usually an issue.
Though balancing requires practice.

reohn2
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Re: Lifting front wheel.

Postby reohn2 » 10 May 2018, 10:01am

PDQ Mobile wrote:
Username wrote:
LinusR wrote:Also riding in a very low gear will tend to lift the front wheel. Lean forward and pedal smoothly the hardest gear you can manage.


In a harder gear you will have to push the pedals harder, so there will ultimately be the same amount of torque in the rear wheel. Shifting your weight forward and being as smooth as possible with the pedalling is the best bet. If a hill is that steep there will always be a battle to keep the front wheel down.


Except on a recumbent! It's not usually an issue.
Though balancing requires practice.

Depends on the recumbent :wink:
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PDQ Mobile
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Re: Lifting front wheel.

Postby PDQ Mobile » 10 May 2018, 12:45pm

reohn2 wrote:
PDQ Mobile wrote:
Except on a recumbent! It's not usually an issue.
Though balancing requires practice.

Depends on the recumbent :wink:


Maybe but not on the couple I have owned.

Or did you mean the balancing. :wink:

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gaz
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Re: Lifting front wheel.

Postby gaz » 10 May 2018, 4:48pm

freeflow wrote:You'll just have to accept pedalling at 100 rpm with a 15 inch gear to gobuphill at just over 2mph <big tongue in cheek grin>

At that cadence you'd need a 7" gear to go up hill at just over 2mph :wink: .
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