E90Post
 


ECS BMW
 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > How fast can you safely go with a roofbox?



Reply
 
Thread Tools Search this Thread
      06-03-2009, 02:15 PM   #1
pjs
Colonel
 
pjs's Avatar
 
Drives: F30 335d
Join Date: Oct 2008
Location: NORTH

Posts: 2,541
iTrader: (1)

How fast can you safely go with a roofbox?

Summer is here, and so is a daft question.

Last years summer holiday saw me go to cornwall for 2 weeks, lasted 2 days cos it pissed it down and I came back and went to Spain.

So a late night drive back up the M5/M42/M1 saw me in a hurry, but with the box on the roof didnt set the cruise higher than 87.

Just got back from France and the motorways full of people doing 90++ complete with the roof boxes. So clearly I was been over cautious.

So just how fast can/dare you go with a roof box? ANd has it ever gone wrong?!
pjs is offline  
0
Reply With Quote
      06-05-2009, 01:23 PM   #2
- Paul -
Major General
 
- Paul -'s Avatar
 
Drives: see above.
Join Date: Apr 2005
Location: Yorkshire, UK

Posts: 7,266
iTrader: (5)

Garage List
2005 320D SE  [5.00]
2005 645  [4.50]
Never had one but was coming back from Blackpool recently and saw lots of brake lights ahead.... some nutter was running inbetween the motorway traffic picking up kids clothes and toys!!!!!!! - The car was parked up a little further on with the roofbox wide open. I was amazed at how no-one killed him.
__________________
- Paul - is offline   England
0
Reply With Quote
      06-05-2009, 01:33 PM   #3
CraigUK
Second Lieutenant
 
Drives: E91 320D Sport Tourer
Join Date: Jan 2009
Location: Durham

Posts: 274
iTrader: (0)

Hi, I bought a roofbox for a trip down to the Bavarian Alps a few years back. At the time I had an E46 325 Sport and remember the instructions with the box stated no more than 100 KPH. Initially I was going about 75-80MPH on the Autobahn but after a while I noticed loads of crazy Germans doing alot faster with boxes and canoes on their roofs. I ramped things up and got to about 105mph in the end, very noisy though. On the way back we covered the 500miles doing about 95-100mph where possible, mpg suffered a bit, 22mpg out of a 325 isn't too hot
CraigUK is offline  
0
Reply With Quote
      06-05-2009, 02:09 PM   #4
Carrera RSR
Colonel
 
Carrera RSR's Avatar
 
Drives: E61 M Sport + 924 Turbo
Join Date: Apr 2008
Location: Location: Location:

Posts: 2,937
iTrader: (1)

Garage List
I used to carry a lot of skis in a previous job and travelled to the Alps in various cars with a box on fairly regularly. Used to go flat out wherever possible on the autobahns topping out between 130 and 140mph (wind behind, downhill, quality fuel etc. etc.) The power of the car and how aerodynamic it all is will determine how fast over 100mph you can go.

Depending on how much weight you have on board will depend on how stable you are. Quick lane changes at speed will make the car unstable. Quality of roof box will depend if the box flies open at speed. Extra straps wrapped around can give you peace of mind. Braking can become an issue with a lot of weight as I found out rear ending a car once. Lucky not to loose the box. Some one I know rear ended a car on the M25 and lost his box. It ricocheted off several cars before it came to a rest.

The new BMW box I bought this week (which I believe is made by Thule) just says observe speed limits up to 130kph.
Carrera RSR is offline   England
0
Reply With Quote
      06-05-2009, 02:54 PM   #5
doughboy
Major General
 
doughboy's Avatar
 
Drives: E91 335i Sold.
Join Date: Jan 2009
Location: UK

Posts: 6,370
iTrader: (2)

Quote:
Originally Posted by pjs View Post
but with the box on the roof didnt set the cruise higher than 87.
You mean your missus lets you do more than 72?

oh I wish. :-(

I'm buying a roof box, speed isn't the issue, it's more about whether I'll need step ladders to load all her crap into it?
__________________
335i gone E63 AMG here at last!
doughboy is offline   United Kingdom
0
Reply With Quote
      06-05-2009, 04:54 PM   #6
pjs
Colonel
 
pjs's Avatar
 
Drives: F30 335d
Join Date: Oct 2008
Location: NORTH

Posts: 2,541
iTrader: (1)

Quote:
Originally Posted by doughboy View Post
You mean your missus lets you do more than 72?

oh I wish. :-(

I'm buying a roof box, speed isn't the issue, it's more about whether I'll need step ladders to load all her crap into it?


Ha, i get 'the look' at 90, the 'ahem' at 95......
pjs is offline  
0
Reply With Quote
      06-05-2009, 05:01 PM   #7
Mr.N
BM Baby
 
Mr.N's Avatar
 
Drives: E92 335d
Join Date: Sep 2008
Location: North West

Posts: 404
iTrader: (0)

Quote:
Originally Posted by pjs View Post
Ha, i get 'the look' at 90, the 'ahem' at 95......
I know that well!
Mr.N is offline   United Kingdom
0
Reply With Quote
      06-06-2009, 01:05 AM   #8
Dr Dave
Zummerzet Zyder Drinker!
 
Dr Dave's Avatar
 
Drives: '06 330D Le Mans Blue
Join Date: May 2009
Location: Somerset

Posts: 5,540
iTrader: (3)

Garage List
Quote:
Originally Posted by pjs View Post
Ha, i get 'the look' at 90, the 'ahem' at 95......
LOL! I get the "look" from the wife at 95 and at 96 I get the speed limit chime too.......time to back off then!
__________________
Dr Dave is offline   United Kingdom
0
Reply With Quote
      06-06-2009, 02:10 AM   #9
Carrera RSR
Colonel
 
Carrera RSR's Avatar
 
Drives: E61 M Sport + 924 Turbo
Join Date: Apr 2008
Location: Location: Location:

Posts: 2,937
iTrader: (1)

Garage List
Quote:
Originally Posted by pjs View Post
Ha, i get 'the look' at 90, the 'ahem' at 95......
Quote:
Originally Posted by Mr.N View Post
I know that well!
Quote:
Originally Posted by Dr Dave View Post
LOL! I get the "look" from the wife at 95 and at 96 I get the speed limit chime too.......time to back off then!
He He! Looks like we all know who the real boss is then
Carrera RSR is offline   England
0
Reply With Quote
      06-06-2009, 05:07 AM   #10
Dr Dave
Zummerzet Zyder Drinker!
 
Dr Dave's Avatar
 
Drives: '06 330D Le Mans Blue
Join Date: May 2009
Location: Somerset

Posts: 5,540
iTrader: (3)

Garage List
Quote:
Originally Posted by carrerarsr View Post
He He! Looks like we all know who the real boss is then

......and we'll not get onto the subject of back seat drivers!!
__________________
Dr Dave is offline   United Kingdom
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 06:57 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST