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View Full Version : At a crossroad - Straps or Grommets - opinions wanted



RV3maker
10-01-2014, 11:38 PM
I have been working on my Aurora seat. I was about ready to order a bunch of mesh and strapping from AHH.com and found a good suitable mesh material and a bunch of strapping and plastic clips at our local surplus store. It is a bit mix match on kind/color of strap and had to settle for dark green mesh . . but got about $150 worth of materials for about $30.

I was originally going to go with strapping and clips since I picked them up so cheap, but then decided to get some grommets and just go that route. I have used grommets on my tricruiser prone seat and they worked well with bungee and even better with paracord. BUT, looking at the seat all sewed up and setting on the pool table . . . .I am thinking that with a little bit more sewing I could have the straps on it allowing for easier removal and adjustment . . . ? I had a LWB Radius C4 recumbent with a mesh upper seat back and it had straps and I never needed to ever touch them?

I welcome your opinions on which your prefer and your experiences good or bad.

https://lh6.googleusercontent.com/-h9Sjn3EbMaw/VCzHK1z_IYI/AAAAAAAACpQ/d9SlMs7Va7Y/w737-h553-no/20141001_221429_resized.jpg
https://lh6.googleusercontent.com/-iSRjvRJGDls/VCzHNaf7KJI/AAAAAAAACps/hSZkuTveSjA/w737-h553-no/20141001_221744_resized.jpg
https://lh3.googleusercontent.com/-JoZxenn1qcs/VCzHL9dXJ9I/AAAAAAAACpg/jXed4ip7YJI/w415-h553-no/20141001_221642_resized.jpg
https://lh5.googleusercontent.com/-6hxGqjiwG1w/VCzHMi_4K3I/AAAAAAAACpo/bUlBHNEiOzc/w415-h553-no/20141001_221720_resized.jpg


Rob
RV3maker :wings:

sandman
10-02-2014, 01:46 AM
I would opt for grommets and paracord, I tried straps and bungee cross laced and found on a long ride I could feel both digging in my back ended up lacing round the seat frame using 8mm bungee cord,far better but hard to get enough tension on, I resorted to using cable ties to crimp each lace section. The fabric I used was trampolene mesh,very strong but a pig to work with, what is the fabric in your pics ?
regards
John

dmac257
10-02-2014, 12:38 PM
I am about to start sewing the mesh seat and trying to decide the same thing as you. I have the mesh but I don't know how well I will be able to fasten it to suitable material for a grommet. Trampolene mesh might work better than the mesh I have now but local stores don't sell it. Maybe someone can provide a link for online source for me, but still wondering how to lace it onto the frame. In your picture, it looks like your overhang will wrap completely around the back edges and OVER the curved spreader/mount, which seems to me will make it harder to get good tension on the front part as the spreader will get in the way. In the top picture I see straps with detached clips so maybe these are providing the tension on the front? I am still thinking through how to mount the mesh to the frame and welcome any ideas.
dmac257

sandman
10-02-2014, 01:37 PM
I am about to start sewing the mesh seat and trying to decide the same thing as you. I have the mesh but I don't know how well I will be able to fasten it to suitable material for a grommet. Trampolene mesh might work better than the mesh I have now but local stores don't sell it. Maybe someone can provide a link for online source for me, but still wondering how to lace it onto the frame. In your picture, it looks like your overhang will wrap completely around the back edges and OVER the curved spreader/mount, which seems to me will make it harder to get good tension on the front part as the spreader will get in the way. In the top picture I see straps with detached clips so maybe these are providing the tension on the front? I am still thinking through how to mount the mesh to the frame and welcome any ideas.
dmac257
Where you intend to sew back the mesh up with Dacron tape, its amazingly strong and comes in different widths and colours, also there is a self adhesive version used for emergency sail repairs, any chandlers or sail loft will stock it.
This how I did mine
http://s20.postimg.org/xmkcomrrx/seat_tensioning.jpg

regards
John

bambuko
10-02-2014, 05:47 PM
Did you do it yourself John? or did you get some pro help?
Looks very impressive!

BTW, assuming that you don't plan to remove it very often, this method:
https://sites.google.com/site/recycledrecumbents/seat-covering
seems to me the easiest?

RV3maker
10-02-2014, 08:42 PM
In your picture, it looks like your overhang will wrap completely around the back edges and OVER the curved spreader/mount, which seems to me will make it harder to get good tension on the front part as the spreader will get in the way. In the top picture I see straps with detached clips so maybe these are providing the tension on the front? I am still thinking through how to mount the mesh to the frame and welcome any ideas.
dmac257

In the first pic you are seeing the cut reinforcement straps laid on the seat. I have to (or my wife) sew them onto the mesh and onto the vertical strips/straps. After they are sewn on, I will cut the fabric in between them to then be able to spread the cross bars. Doing it this way makes sure these "cut straps" are sewn to both the inner and outer vertical straps. The inner vertical straps (wider) are also folded on the ends and sewn back onto each other at the top and bottoms ends of the seat fame tubes so I can slide the seat tubes into it on the top and bottom so that the mesh is captured at both ends. kinda like the tops of portable folding chairs. I put this strap there to do that as well as provide an abrasion barrier for the mesh on the seat sides so that it would not rub through on the edges from pulling it tight with paracord or straps.

Not sure how it will work yet, but hoping it will turn out okay. My challenge was that my seat is not the same width throughout on the bottom, middle and top cross bars. I contoured it to fit one of my patio lounge chairs and, well, my wife's "features". I made it a little wider on the back/bottom because woman are built different than men. She fits comfortably in our patio chair . . . so it's gotta work . . . right? :-)

https://lh5.googleusercontent.com/-8g7FO9ZCSjo/VATCu9olBYI/AAAAAAAACQY/edE4UOo7AtU/w415-h553-no/20140824_145014_resized.jpg
https://lh6.googleusercontent.com/-a-Rg9w15zJw/VATCuN6Ue1I/AAAAAAAACQQ/lzZ13sT3jqg/w737-h553-no/20140824_144958_resized.jpg

Rob
RV3maker

RV3maker
10-02-2014, 08:46 PM
Sandman, what material did you use and do you remember the hole size (1.8, 2.0, ?)? My mesh is not optimal material, but it will work. I was kind of experimenting with this seat and was going to use it to get everything mounted and spaced (steering, bottom bracket, handlebars) and then ride with it . . .with the intention of eventually duplicating it with better material and/or lessons learned from the first try.

Rob
RV3mker

imamedik
10-02-2014, 09:00 PM
Rob, just to throw another idea your way

http://s20.postimg.org/fv53sabux/IMG_0289.jpg (http://postimg.org/image/fv53sabux/) http://s20.postimg.org/4hikh31c9/IMG_0274.jpg (http://postimg.org/image/4hikh31c9/) http://s20.postimg.org/5z40sn62x/IMG_0276.jpg (http://postimg.org/image/5z40sn62x/)

I bought 100 yards of Polypropylene webbing (http://www.countrybrookdesign.com/webbing-and-hardware/polypropylene-webbing-polypro/1-inch/webbing-polypro-black-1-inch.html) for under $20 and a grommet kit from Home Depot (only had to use 2). After wrapping/ weaving this seat I still have enough left over for three other seats:jester:

dmac257
10-02-2014, 10:11 PM
Rob, just to throw another idea your way

http://s20.postimg.org/fv53sabux/IMG_0289.jpg (http://postimg.org/image/fv53sabux/) http://s20.postimg.org/4hikh31c9/IMG_0274.jpg (http://postimg.org/image/4hikh31c9/) http://s20.postimg.org/5z40sn62x/IMG_0276.jpg (http://postimg.org/image/5z40sn62x/)

I bought 100 yards of Polypropylene webbing (http://www.countrybrookdesign.com/webbing-and-hardware/polypropylene-webbing-polypro/1-inch/webbing-polypro-black-1-inch.html) for under $20 and a grommet kit from Home Depot (only had to use 2). After wrapping/ weaving this seat I still have enough left over for three other seats:jester:

I was at home depot and saw 1.75 W x 100 Yards Woven Vinyl Hanger Strap (http://www.homedepot.com/p/Master-Flow-1-75-W-x-100-Yards-Woven-Vinyl-Hanger-Strap-HS1-75WV/100396948)and if I can't get my mesh seat tight enough I will buy that strap it and wrap it like you did on your seat.. yours looks very nice BTW. Looks like you started at the bottom and alternated up till you got to the end and tied at the top? do you think the 1.75 will be too wide? Think I should go with the narrower webbing like you used?
dmac257

IrvJamison
10-03-2014, 01:35 AM
Take a look at this site: https://web.archive.org/web/20130801103930/http://www.fleettrikes.com/tthindex.htm

dmac257
10-03-2014, 02:10 AM
I think I am going to skip right to using the aluminum rods in a long pocket that I will sew to the mesh. If I can't get enough tension that way I will wrap strapping but hoping the mesh will be good enough. Hoping tomorrow will be dry and warm enough to spray paint the frame.. if not then inside on the sewing machine.
dmac257

Ticktock
10-03-2014, 08:24 AM
Provided you speak nicely to Mr Murphy every morning, it will work!!
If you don't------------------------?????
Steve G

RV3maker
10-03-2014, 10:20 AM
Rob, just to throw another idea your way


I bought 100 yards of Polypropylene webbing (http://www.countrybrookdesign.com/webbing-and-hardware/polypropylene-webbing-polypro/1-inch/webbing-polypro-black-1-inch.html) for under $20 and a grommet kit from Home Depot (only had to use 2). After wrapping/ weaving this seat I still have enough left over for three other seats:jester:

I thought about this option as well. I was a bit worried my wife may be a bit uncertain about how she feels about the seat as she has not rode recumbents bike before. I thought that this option may allow me the most flexibility in make adjustments and figuring out what she likes and does not like. I am a bit worried she won't like all the lumbar I bent into the seat frame . . . .we'll see.

Great idea!

Rob

sandman
10-03-2014, 01:57 PM
Rob,
the material is trampoline mesh very strong but very stiff to work with and the grommets/eyelets are 12mm stainless steel, a bit dearer but a lot stronger. regarding the bungee cord I made the mistake of using cheap 8mm bungee cord which only had one solid core of rubber, you could stretch that forever and not get good tension, replaced it with genuine cord with multiple cores and it was a lot better but still trickey to get good tension all through hence the cable ties to lock of the tension at each eyelet.
Believe me that lumbar support is well worth the bending, I have been in my trike riding for 12 hours and got off without feeling any discomfort.
Chris
I have to admit to having access to a sail loft and its awsome sewing machines and applying the correct liquid inducement had the sewing done by an ace sailmaker(its was he that suggested the dacron tape where the eyelets go to prevent them cutting through.
hope this helps
regards
John

imamedik
10-03-2014, 08:12 PM
I was at home depot and saw 1.75 W x 100 Yards Woven Vinyl Hanger Strap (http://www.homedepot.com/p/Master-Flow-1-75-W-x-100-Yards-Woven-Vinyl-Hanger-Strap-HS1-75WV/100396948)...... do you think the 1.75 will be too wide? Think I should go with the narrower webbing like you used?
dmac257

dmac, I think it might be but for that price it could be worth a try :jester:

FrankCrank
10-04-2014, 05:12 AM
....may as well add my 2 baht worth. As with Imamedik, I prefer webbing, and used 1" nylon. A roll will be enough for at least 2 seats. Have tried using mesh, but went all saggy in no time at all. The lumbar support part is a must have in my opinion, and another factor was breathability given where I cycle, and added a 3D cover for the backrest area. Anyhow, a couple of pics :

http://s29.postimg.org/6h3j0t6lf/IMG_2729.jpg (http://postimg.org/image/6h3j0t6lf/) http://s27.postimg.org/6cs9405cf/IMG_2730.jpg (http://postimg.org/image/6cs9405cf/)

The seat and back are 2 separate pieces of webbing, allows easy adjustment to get the right tension. Used velcro at one end to secure, and cam buckle at the other end to enable easy re-tensioning.
Anyways - works for me....

jpsantell
10-04-2014, 07:02 AM
I made a seat from 1/2 and 3/4 conduit much like rv3makers. I purchased some phifertex and plan to use grommets reinforced with tarp repair tape on the sides, maybe wrapping the sides in 3 or 4 times before grommetting. I still have to figure out how to mount the seat to my Aurora frame so that it doesn't wobble and I am kind of hoping to make it adjustable too.

RV3maker
10-11-2014, 07:07 PM
Well, here is the finished seat. I still have to cut all the thread off of it so it is still a bit "hairy". All in all I am happy how it came out, except for the goofed extra grommet I put in one of the bottom flaps - oops! It seems to be fairly tight, even with he top and bottom ends of the side strap folded over on the tube. This seems to hold the seat mesh in place well, like the ends of a folder chair.

Now the challenge it to mount it . . .I have some ideas to make it adjustable . . . .more to follow!

Rob
RV3maker :wings:
https://lh4.googleusercontent.com/--uMXZVZtGY4/VDm10Y9eenI/AAAAAAAACqA/tq0gHgFTR8s/w737-h553-no/20141011_173700_resized.jpg
https://lh5.googleusercontent.com/-E96jZgyfxJI/VDm11LoGmdI/AAAAAAAACqE/LwOCuKExh1c/w737-h553-no/20141011_173709_resized.jpg
https://lh5.googleusercontent.com/-tuNlWXutWuw/VDm12aLgzoI/AAAAAAAACqQ/4udWKAFOz1Q/w415-h553-no/20141011_173746_resized.jpg
https://lh3.googleusercontent.com/-ZF9-tARyojs/VDm13E_H-4I/AAAAAAAACqU/2BhwfjYmkuo/w415-h553-no/20141011_173755_resized.jpg
https://lh3.googleusercontent.com/-pIaZw9nNUeo/VDm16aIdtaI/AAAAAAAACrA/TcsOYfofC0I/w737-h553-no/20141011_173857_resized.jpg
https://lh6.googleusercontent.com/-3zPv5F-lir8/VDm17Hr_noI/AAAAAAAACrE/aMUVGbVQQjc/w737-h553-no/20141011_173934_resized.jpg
https://lh4.googleusercontent.com/-4GUscfzuDjY/VDm179uiH0I/AAAAAAAACrQ/ZIbCMCFd-Ag/w737-h553-no/20141011_173951_resized.jpg

FrankCrank
10-12-2014, 03:49 AM
...that looks a very decent seat to me, so good on ya! Some simailar ones I've seen can looked all bunched up on that steep curve where the seat meets the back rest part, but yours looks very smooth - a pukka job, rather than pucker :)

dmac257
10-12-2014, 09:22 PM
looks REAL NICE!! good job.
dmac257

sandman
10-13-2014, 12:30 PM
A very neat job indeed, congratulations
regards
John

dmac257
06-01-2015, 09:08 PM
just wanted to know how well your seat held up to use? I made one similar to yours but the seams are coming apart along the frame of the seat where it wraps around to the back. Second repair in less than a month of riding, so looking for a different material that holds the stitching a little better.
dmac257

RV3maker
06-02-2015, 01:43 PM
Hey dmac257,

I wish I could say that my seat has some miles on it, but it only has test fitting time on it. The Aurora is assembled and ready for the initial test ride after I get the brake handles and cables fitted and installed. So far, the webbing and stitches have showed no signs of coming undone and the webbing that contacts the tubing is not chaffing or showing any signs of coming a part (seat belt harringbone webbing). . .my thoughts were if they did I could take the seat fabric into an upholstery shop and have them sew over my "sewing machine" seams with some heavy duty thread/stitches.

I will keep you posted. Should see some wear and tear soon.

Rob
RV3maker