Go Back  Bike Forums > Bike Forums > Framebuilders
Reload this Page >

Trailer wheel mounts for 9mm QR wheels

Notices
Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

Trailer wheel mounts for 9mm QR wheels

Old 04-10-15, 09:58 PM
  #1  
Redhatter
Senior Member
Thread Starter
 
Redhatter's Avatar
 
Join Date: Feb 2015
Location: Brisbane, QLD, Australia
Posts: 353

Bikes: Dahon fold-up, '12 Giant Talon 29 ER 0, '16 Giant Toughroad SLR1.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
Trailer wheel mounts for 9mm QR wheels

Hi all,

This is related to my trailer build but I figure this is a more appropriate question since it affects those who might want to build their own bicycle frame too.

I've recently purchased some Shimano MT35 MTB wheels which I intend to use in a touring trailer. They have 29" road tyres fitted and 160mm centre-lock disc brakes (that'll be another question; how to mount the calipers, but I can probably work something out). The original intention was to go 10mm thru-axle with the wheels so they'd be compatible with the mountain bike but alas, this didn't happen.

So I'm making do with the 9mm QRs and have to figure out how to mount them. The most obvious solution to me seems to be to use aluminium angle that can be bolted to the underside of the trailer frame (1" aluminium box section) with a 9mm wide notch cut out for the axle to slot into. In the interests of science, I gave this a try.



One thing that became apparent is how far I needed to tighten the skewer for the whole assembly to sit firmly. The skewer protrudes out the end of the axle nut (about 7mm), and I'm not sure if I should be concerned. It seems I have 3 options:
  • "She'll be right mate": Ignore this and carry on.
  • Use washers or bolt a second 3mm thick plate (with aligned slot) to the bracket to thicken it
  • Use a thicker piece of aluminium angle

Do I need to make this mounting a little thicker or would this conceivably work? Anything else I'm potentially overlooking?
Redhatter is offline  
Old 04-10-15, 10:26 PM
  #2  
CliffordK
Senior Member
 
CliffordK's Avatar
 
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 23,555
Mentioned: 182 Post(s)
Tagged: 0 Thread(s)
Quoted: 9784 Post(s)
Liked 329 Times in 259 Posts
I assume you have it clamped to a piece of aluminum on each side.

Is it tight on the aluminum, and holding firmly? Width spacing is appropriate?

I wouldn't add washers, they'll just cause problems. Either ignore the extra length of QR, or cut it off.

How long is your skewer?
I'm having troubles with my Ultegra skewers that are too short for my Kona King Zing.
The skewer is about 5" (127mm) long with the QR closed.
CliffordK is online now  
Old 04-10-15, 11:17 PM
  #3  
Redhatter
Senior Member
Thread Starter
 
Redhatter's Avatar
 
Join Date: Feb 2015
Location: Brisbane, QLD, Australia
Posts: 353

Bikes: Dahon fold-up, '12 Giant Talon 29 ER 0, '16 Giant Toughroad SLR1.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
Originally Posted by CliffordK View Post
I assume you have it clamped to a piece of aluminum on each side.

Is it tight on the aluminum, and holding firmly? Width spacing is appropriate?

I wouldn't add washers, they'll just cause problems. Either ignore the extra length of QR, or cut it off.

How long is your skewer?
I'm having troubles with my Ultegra skewers that are too short for my Kona King Zing.
The skewer is about 5" (127mm) long with the QR closed.
It is indeed clamped on both sides, the other piece hasn't got the notch cut out but is cut from the same lump of angle that my crude bracket was made from. I can pick the wheel up by the two aluminium brackets and shake it quite vigorously, nothing moves. I've also tried placing the wheel on the ground, holding the top with one hand then placing my foot on the bracket and attempting to push it off. It seems to be taking the weight.

The skewer appears to be about 150mm long, give or take a bit, with the quick release closed.
Redhatter is offline  
Old 04-10-15, 11:27 PM
  #4  
CliffordK
Senior Member
 
CliffordK's Avatar
 
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 23,555
Mentioned: 182 Post(s)
Tagged: 0 Thread(s)
Quoted: 9784 Post(s)
Liked 329 Times in 259 Posts
Measuring just the skewer?

Is it possible you have a rear skewer instead of a front skewer?
CliffordK is online now  
Old 04-11-15, 12:19 AM
  #5  
Redhatter
Senior Member
Thread Starter
 
Redhatter's Avatar
 
Join Date: Feb 2015
Location: Brisbane, QLD, Australia
Posts: 353

Bikes: Dahon fold-up, '12 Giant Talon 29 ER 0, '16 Giant Toughroad SLR1.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
It's possible. That's measuring the skewer from the back of the locking cam to the tip. By the looks of things though this isn't going to be a show stopper.
Redhatter is offline  
Old 04-11-15, 04:51 AM
  #6  
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 18,764
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 99 Times in 83 Posts
I know I'm weak-minded and inflexible, but the first thing that I would think of for this purpose is a fork dropout. Your problem is that fork dropouts are thicker than the aluminum you used. Can't be sure that is a problem for the skewer or not, if you have threads left beyond what it takes to tighten down on the dropout, then there is no problem other than the dropout possibly being too weak. That's assuming that the axle isn't too long for the dropout

I don't think the yank test is sufficient load testing. Are you going to have brakes on this trailer? Because that is going to rip the wheel out of your homemade dropout
unterhausen is offline  
Old 04-11-15, 05:22 AM
  #7  
Redhatter
Senior Member
Thread Starter
 
Redhatter's Avatar
 
Join Date: Feb 2015
Location: Brisbane, QLD, Australia
Posts: 353

Bikes: Dahon fold-up, '12 Giant Talon 29 ER 0, '16 Giant Toughroad SLR1.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
There will be brakes… basically the solution I'm looking at now is to effectively double the thickness of that drop-out to 6mm by layering two sections of aluminium angle on top of each-other.



So essentially I move where the drop-out is vertically and re-orient it, then since I need that 3mm spacing to align the callipers to the rotor, I use that extra thickness to re-enforce the drop-out.
Redhatter is offline  
Old 04-11-15, 09:18 AM
  #8  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 41,396

Bikes: 8

Mentioned: 188 Post(s)
Tagged: 0 Thread(s)
Quoted: 6950 Post(s)
Liked 257 Times in 211 Posts
May be prudent to weld a bit more thickness and Just have the 5mm skewer pass through the outer Most hole .

So wheel wont Go flying out on its Own .. Putting the skewer thru the hole and the axle and out another hole will be a simple safety feature .

so 9mm axle sits still in the dropout to support the weight via the axle ends . another safety system may be arraigned,

but you need to consider the forces a disc brake exerts wanting to push axles out of the dropouts.
fietsbob is offline  
Old 04-11-15, 02:49 PM
  #9  
Redhatter
Senior Member
Thread Starter
 
Redhatter's Avatar
 
Join Date: Feb 2015
Location: Brisbane, QLD, Australia
Posts: 353

Bikes: Dahon fold-up, '12 Giant Talon 29 ER 0, '16 Giant Toughroad SLR1.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
Yeah, I won't be welding this, I don't have access to or knowledge of how to use a welder. The good news here is that the trailer will have no more than about 50kg of load on it, whereas on a bicycle, it'd have >100kg.

That will reduce forces somewhat.

To be clear, you're suggesting expanding the thickness out to say 9mm? (33mm layers)

Update: did some modelling of the situation. See http://www.longlandclan.yi.org/~stua...04/12-trailer/



Last edited by Redhatter; 04-11-15 at 03:54 PM.
Redhatter is offline  
Old 04-11-15, 03:58 PM
  #10  
CliffordK
Senior Member
 
CliffordK's Avatar
 
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 23,555
Mentioned: 182 Post(s)
Tagged: 0 Thread(s)
Quoted: 9784 Post(s)
Liked 329 Times in 259 Posts
If you look at the common kid's trailers, they are made out of pretty thin aluminum.
I don't like going over 100 pounds with the one with the wheel held from one side, but the one with the wheel held on both sides can carry 100 pounds, or perhaps a bit more ok.

I'd do a thick single piece of aluminum rather than a double layer of metal... with a few exceptions.

On my "heavy" cargo trailer, I cut a piece of aluminum channel in half, then machined a step into the sides. The pieces were cut as long as the wheel wells, and welded in place.

It was supposed to get hub brakes designed as "surge" brakes, but I never got that part done, and haven't found a need for it with the riding that I typically do. Depending on the direction of travel and your brake mount, it will either push it in, or pull it out of the dropouts.


My Cargo Trailer, wheel mount cut out of 3" aluminium channel. Note thicker at bottom. Machined flat spot for wheel mount. I know the welds aren't that clean. I was hurrying, and having a tough time with the aluminum



This is the basic 2-sided Kid's trailer. A little beefier material than I thought, but short. Also serves as a joint for tubing. Rearward angled slots, I don't know if this is necessary, but it would keep wheels from being pulled out while riding.
Attached Images
File Type: jpg
Cargo-1.jpg (105.8 KB, 3 views)
File Type: jpg
Cargo-2.JPG (50.4 KB, 3 views)
File Type: jpg
KidsTrailer-1.JPG (97.7 KB, 3 views)
File Type: jpg
KidsTrailer-2.JPG (61.2 KB, 4 views)
CliffordK is online now  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Winfried
Utility Cycling
9
05-03-19 03:07 PM
Windyrum
Bicycle Mechanics
9
03-16-16 10:25 AM
arindia556
Touring
5
03-21-14 07:00 AM
Tyshalle83
Bicycle Mechanics
3
08-26-13 11:56 AM
nancy sv
Touring
4
10-31-10 03:30 PM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.