Roof Rack - Page 5 - Kia Niro Forum
 11Likes
Reply
 
LinkBack Thread Tools
post #41 of 50 (permalink) Old 03-02-2019, 10:27 AM
Junior Member
 
Join Date: Mar 2019
Posts: 3
I checked Micksgarage.com and his racks are sold-out. Found the same at www.carid.com for $179.99. Is that close to what you paid? it seems reasonable compared to others I've looked at. This system is the G3 - 60.130 Clop Railing Roof Rack System at www.carid.com
Makeajoyfulnoyes is offline  
Sponsored Links
Advertisement
 
post #42 of 50 (permalink) Old 03-02-2019, 10:58 AM
Senior Member
 
Join Date: Oct 2018
Location: Murrieta, CA
Posts: 324
Mick's claims to still have the Nordrive racks in stock https://www.micksgarage.com/d/roof-r...lid-roof-rails. Current price is $103.49 plus about $15 in shipping. These fit my 2018 PHEV and they have a slightly higher load rating than some of the other models. I've only had them on the car once: they were noisy above 40 MPH. Someone suggested wrapping a bungee cord around the cross bar to reduce the noise, but I haven't tried that yet. I think wind noise might be a common problem with roof racks on the Niro. I wonder if one of the top brands such as Thule has figured out a solution for that yet.
Dovidan likes this.

2018 Niro PHEV Gravity Blue
deltasmith is online now  
post #43 of 50 (permalink) Old 04-14-2019, 10:03 PM
Senior Member
 
Join Date: Oct 2018
Location: Murrieta, CA
Posts: 324
Quote:
Originally Posted by Billraab View Post
I have the OEM roof rack and have tried everything to make them quieter in regards to placement. I have a sun roof and really like to use it. I have taken to only having them mounted when hauling our kayaks around. But recently I have found info about wrapping a bungee cord around the crossbars from end to end. Claims are that it make a world of difference. Just google it or look for it on YouTube. Should be easy enough to find examples and experiences. I will try it next year once our forever long MN winter ends.
Sorry for the delayed response - I had removed my roof rack by the time I read your post. Thank you for this suggestion! It works great! Had my roof rack on this weekend and noticed it humming pretty loud as soon as I got up to 40 MPH, even with some stuff tied on (on the passenger's side - the driver's side was clear). Got home and unloaded, and decided to leave the rack on for another day so I could try your suggestion. I had two short bungee cords that I hooked together in order to make one that was just barely long enough to go across the front cross bar and also wrap around the bar twice. Took it up to 60 today and it was virtually silent!


Now I'm trying to fathom what the scientific explanation is for this "cure". But at least I have one. Thanks again for suggesting this.
Dovidan likes this.

2018 Niro PHEV Gravity Blue
deltasmith is online now  
post #44 of 50 (permalink) Old 04-25-2019, 03:02 AM
Junior Member
 
iamteeg's Avatar
 
Join Date: Apr 2019
Location: Bensalem, PA, USA
Posts: 21
Garage
Quote:
Originally Posted by deltasmith View Post
Quote:
Originally Posted by Billraab View Post
I have the OEM roof rack and have tried everything to make them quieter in regards to placement. I have a sun roof and really like to use it. I have taken to only having them mounted when hauling our kayaks around. But recently I have found info about wrapping a bungee cord around the crossbars from end to end. Claims are that it make a world of difference. Just google it or look for it on YouTube. Should be easy enough to find examples and experiences. I will try it next year once our forever long MN winter ends.
Sorry for the delayed response - I had removed my roof rack by the time I read your post. Thank you for this suggestion! It works great! Had my roof rack on this weekend and noticed it humming pretty loud as soon as I got up to 40 MPH, even with some stuff tied on (on the passenger's side - the driver's side was clear). Got home and unloaded, and decided to leave the rack on for another day so I could try your suggestion. I had two short bungee cords that I hooked together in order to make one that was just barely long enough to go across the front cross bar and also wrap around the bar twice. Took it up to 60 today and it was virtually silent!


Now I'm trying to fathom what the scientific explanation is for this "cure". But at least I have one. Thanks again for suggesting this.
The bungee cords help reduce the vibrations caused by the wind, and vibrations ARE sound.

----- ----- ----- ----- -----
Tom “Teeg” Joyce - Bensalem, PA
2019 Kia Niro LX w/ Adv. Tech. Pkg, deep cerulean
KIA Accessories: Hood Deflector, Window Visors, All-Weather Floor Mats, Cargo Cover, Cargo Net, Rear Bumper Applique.
Bulbs Swapped (LED): ALL interior (white), Back-Up/Reverse (White), Fog lights (6000K White), Headlights (6000K White)
Other Accessories & Mods: K&N Air Filter, Generic Crossbars, F/R Dashcam
Future: Mud Flaps, Window Tint, Escort strobes?
iamteeg is offline  
post #45 of 50 (permalink) Old 04-26-2019, 06:46 AM
Member
 
Billraab's Avatar
 
Join Date: Aug 2017
Location: Minneapolis, MN
Posts: 44
Amazing... glad to hear it. I have yet to try it this year but it will happen soon. Thanks for the FB.
Billraab is online now  
post #46 of 50 (permalink) Old 04-27-2019, 12:01 AM
Senior Member
 
Join Date: Oct 2018
Location: Murrieta, CA
Posts: 324
Quote:
Originally Posted by iamteeg View Post
The bungee cords help reduce the vibrations caused by the wind, and vibrations ARE sound.
Yeah - vibrations are sound for sure, but I'm not buying the idea that bungee cords are reducing them directly, because I drove home with 20 pounds of pipe on the passenger side and no bungees or weight on the drivers side and I heard a lot of noise that I don't hear when I have a bungee stretched all the way across. I'm thinking that 20 pounds of pipe on one side should be at least as effective, if not more so, than a bungee cord all the way across, if we're just talking about damping vibrations in the cross bars.


My current best guess is that the bungee does something to alter the air flow/turbulence in a way that shuts down the humming sound. If you blow over the top of a soda bottle, you hear a hum. If you put your finger on the edge and blow over that, you don't hear much. It's a primitive analogy, but I'm thinking this might be closer to the explanation of what's going on.


Quote:
Originally Posted by Billraab View Post
Amazing... glad to hear it. I have yet to try it this year but it will happen soon. Thanks for the FB.
I tried it again today with a single, longer bungee, and it worked equally well. Thank you for suggesting it.

2018 Niro PHEV Gravity Blue
deltasmith is online now  
post #47 of 50 (permalink) Old 04-27-2019, 12:09 AM
Junior Member
 
iamteeg's Avatar
 
Join Date: Apr 2019
Location: Bensalem, PA, USA
Posts: 21
Garage
Quote:
Originally Posted by deltasmith View Post
Quote:
Originally Posted by iamteeg View Post
The bungee cords help reduce the vibrations caused by the wind, and vibrations ARE sound.
Yeah - vibrations are sound for sure, but I'm not buying the idea that bungee cords are reducing them directly, because I drove home with 20 pounds of pipe on the passenger side and no bungees or weight on the drivers side and I heard a lot of noise that I don't hear when I have a bungee stretched all the way across. I'm thinking that 20 pounds of pipe on one side should be at least as effective, if not more so, than a bungee cord all the way across, if we're just talking about damping vibrations in the cross bars.
Not here to argue: I’m finding this interesting... but I’m pretty sure that having 20lbs I’d pipe is less relevant than the shape of the pipe and if it’s open on both ends or one end or not at all. In any case, I think especially if the pipe is properly strapped on that in physics terms, it becomes essentially the same piece when speaking of vibrations. So the factor there is that nothing has made the crossbars and the payload any more aerodynamic.

----- ----- ----- ----- -----
Tom “Teeg” Joyce - Bensalem, PA
2019 Kia Niro LX w/ Adv. Tech. Pkg, deep cerulean
KIA Accessories: Hood Deflector, Window Visors, All-Weather Floor Mats, Cargo Cover, Cargo Net, Rear Bumper Applique.
Bulbs Swapped (LED): ALL interior (white), Back-Up/Reverse (White), Fog lights (6000K White), Headlights (6000K White)
Other Accessories & Mods: K&N Air Filter, Generic Crossbars, F/R Dashcam
Future: Mud Flaps, Window Tint, Escort strobes?
iamteeg is offline  
post #48 of 50 (permalink) Old 04-27-2019, 07:56 AM
Super Moderator
 
Join Date: Sep 2018
Posts: 390
I think you need to look at the movement of air over the car. When people read the words Aerodynamics they think purely of drag, but the science has much more than that. As the air moves over your car, it compresses at the front and creates eddies and torrents as it moves over the body of the car. In the lower and higher pressure zones created there is an awful lot of force. Think of how an aeroplane wing works. Why does it lift that amount of weight and think of the noise inside a plane.


The bunji cord flaps around between the two wings that are your roof rack. There is a whole load of turbulence happening on the roof of your car that will setup pockets of height pressure air that cause the roof rack to vibrate. The bunji just flaps around and breaks up the rolls of air so they are now scattered and makes it so a standing wave vibration cannot happen on the rack bars.



Your example of pipe offset to one side doesn't do anything as it is a static load that doesn't move and leaves the other side that has no weight on it to vibrate but at a much higher pitch as the exposed bar now is shorter.

2018 Niro EX - Ocean Blue
GTA - Canada.
Roadkill401 is online now  
post #49 of 50 (permalink) Old 04-27-2019, 08:33 AM
Senior Member
 
Join Date: Mar 2017
Location: SW Ohio
Posts: 1,698
Weight on a vibrating part lowers the frequency (high to low) for a deeper sound or none perceptible perhaps.

2018 Kia LX HEV Metal Stream with Advanced Tech
yticolev is online now  
post #50 of 50 (permalink) Old 04-27-2019, 12:25 PM
Senior Member
 
Join Date: Oct 2018
Location: Murrieta, CA
Posts: 324
For what it's worth, it sounded almost exactly the same with pipe on one side and nothing on the other side as it sounds when there is nothing on the rack and no bungee cord. Also, it's only the front cross bar that makes a noticeable amount of noise. I do suspect that the primary benefit of the bungee cord is to disrupt the airflow in some way.

2018 Niro PHEV Gravity Blue
deltasmith is online now  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Roof racks for cargo, bikes etc. ColoNiro Exterior 26 02-15-2019 09:49 AM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome