does any one use a roof box?
sheepsteeth
Posts: 17,418
im planning a little trip around the uk in the spring, there is plenty of room in the car for the wife, 2 hounds and all of our kit but there's nowhere for the bike.
original plan was to put the bike on the roof but i recently found out this could have a pretty negative effect on mpg.
would a roof box have the same effect? they look pretty aero-dynamic but i wonder if they are more-so than a bike :? if they were better, i would keep the bik in the boot and out kit in the box.
so, would a roof box or a bike on the roof be more efficient?
original plan was to put the bike on the roof but i recently found out this could have a pretty negative effect on mpg.
would a roof box have the same effect? they look pretty aero-dynamic but i wonder if they are more-so than a bike :? if they were better, i would keep the bik in the boot and out kit in the box.
so, would a roof box or a bike on the roof be more efficient?
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What car?0
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Never used a roof box but I find my bike on the roof gives a negligible mpg loss.0
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interesting.
someone else mentioned a loss of about 140miles per tank but by their own admission they were driving at 85mph, i wonder if the reduction in mpg is on a steep curve in comparison to speed perhaps?0 -
sheepsteeth wrote:interesting.
someone else mentioned a loss of about 140miles per tank but by their own admission they were driving at 85mph, i wonder if the reduction in mpg is on a steep curve in comparison to speed perhaps?
Yeah it does get progressively worse by quite a bit.0 -
makes sense.
i tend to drive very strictly below 70mph as it means i dont have to be on the look out for the filth and it is suprising how much fuel it saves compared to even driving at 75-80.0 -
Yup, driving slower does help the mpg with bikes on the roof, I've found that over 50-60mph & the MPG decreased rapidly
Driven carefully you shouldn't notice too much of a dip in mpg
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the most economical speed (supposedly) is 56mph, something to do with drag, i know that as speed increases, the drag coeffecient increases exponentially as a squared value of the speed (if that makes any sense), and i think 56 is where the revs are at an adequate level to keep you going, and the wind resistance doesnt make tooo much impact into your MPG.
however that might be bollocks, i just know hypermilers like the number 56
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I've got one of those long thin roof boxes. Don't notice too much difference in MPG when using it.0
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El Capitano wrote:I've got one of those long thin roof boxes. Don't notice too much difference in MPG when using it.
Is that because its poor either way?
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Guess it depends on whether you already have a roofbox, can steal one or need to buy one.
Cost of box needs to be < cost of extra juice.
Or you could leave the wife behind, and have space in the car.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools0 -
if i leave wife and the hounds behind it will save me the fuckarseing about with some kind of roof mounted pish i suppose0
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If you are on a bit of a jaunt it might be worth having the box for bits and pieces and the bikes in the car. Then they are easy to get at, and can be safely locked away overnight.0
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sheepsteeth wrote:if i leave wife and the hounds behind it will save me the fuckarseing about with some kind of roof mounted pish i suppose
And will allow you to leave a trail of hookers in ditches with their heads on backwards.
Win.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools0 -
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And I'll be able to 'visit' Mrs Sheeps more regularly.
Win win.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools0 -
sheepsteeth wrote:this might be the best plan then. i do like to murder whores.
I've got someone you can add to that list if you like? Would involve you travelling to West Brom though...0 -
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no way 140 miles per tank. i put my bike on the roof and i lose maybe a maximum of 60. i know that's a lot of miles but at least you car stays clean 0
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tomorrow im off to Haldon in my 4.6 v8 with three bikes on the back.........will be lucky to get 17mpg, :shock: :oops:
how i wish i could worry about a roof box making a difference......Falcon Sierra - 80's
Muddy Fox Courier - 80's
GT Palomar 90's
GT Zaskar LE - 90's
Cannondale k v 900 90's
Santa Cruz Bullit - now
Orange Evo 8 STOLEN 26/09/10
Orange P7 Pro
Lots of kites.0 -
jonnyc2420 wrote:4.6 v8
Rover 4.6 by any chance?0 -
Max888 wrote:jonnyc2420 wrote:4.6 v8
Rover 4.6 by any chance?
Do you reckon it could be a Range Rover like the one in his profile picture maybe?0 -
-well spotted, except mines now covered in cack and road salt - oh and managed 18mpg on the way back which is a bonus.......... :oops: Falcon Sierra - 80's
Muddy Fox Courier - 80's
GT Palomar 90's
GT Zaskar LE - 90's
Cannondale k v 900 90's
Santa Cruz Bullit - now
Orange Evo 8 STOLEN 26/09/10
Orange P7 Pro
Lots of kites.0 -
:oops: missed that! I suppose 18mpg could be worse for a 3 ton brick
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