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NRS LoPro Frame Fittings

Item: 91028.02 | Product Description »

$19.95

  (7) | Write a Review | Ask a Question | 9 Questions

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The LoPro Fitting is the heart of the NRS frame system, allowing you to configure your frame however you choose. Now in hot-forged aluminum, they're stronger and lighter with a polished, streamlined finish.
  • The NRS LowPro Frame fitting secures cross members and frame accessories to our 1 5/8" OD frame pipe.
  • Forging the aluminum aligns the crystalline structure of the metal, creating a much stronger LoPro than the older, cast version.
  • Because of that extra strength we're able to slim down the profile and hollow the shank, making it 25% lighter while still being stronger!
  • Molded ridges on the gripping surface provide increased holding strength on high-torsion frame accessories like casting platforms, thigh bars and deluxe foot bars.
  • The LoPro fitting includes a coined (flattened curve) U-bolt, two washers and two nylon lock nuts, also a 5/16" x 2" bolt and nylon lock nut for attaching the LoPro to frame pipe.
  • If you're swapping out the new forged LoPros for the older cast ones on your frame parts, be aware that the LoPro will not have holes drilled for the bolt that affixes it to the frame pipe.
NRS frame parts that include LoPro fittings are manufactured here by our skilled Frameshop craftsmen, using specialized lathes, jigs, hydraulic benders and drill presses. For best results we recommend that you only attempt assembling your own frame parts from frame pipe and LoPros if you have good metal shop skills and equipment. If you have specific questions, please give us a call.

Product Reviews

  (7)
Overall Length: 5 1/4"
Shank Length: 2"
Shank outer diameter: 1 3/8"
Fit: Saddle fits pipe with 1 5/8" outer diameter
Saddle Height: 1/2" above bar
Weight: Single with hardware is 0.8 lbs.
Material: Hot-forged 6061-T6 aluminum alloy
Components:
  • 1 - LoPro Fitting
  • 1 - U-bolt with nuts and washers
  • 1 - 2" Bolt with Nut

Do you have questions about this product?

Get answers from real customers and in-house experts with AnswerBox.

9 Questions | 21 Answers
Displaying questions 1-9
  • NRS LoPro Frame Fittings

    Q:

    Can you order a new lopro pre-drilled to fit a crossbar? Why don't they come pre-drilled?
    Asked on 3/24/2015 by Tall One

    5 answers

    • VERIFIED BUYER

      A:

      It would be hard to drill the pipe to exactly match an existing hole. They
      drill fairly easy and can be done with a hand drill if your careful. I
      drilled one side of the cross bar and then mocked up the frame. On the
      other side I put a couple drops of epoxy on the fitting to hold it in place
      while I removed it and drilled the bolt hole.

      Answered on 3/27/2015 by Anonymous
    • VERIFIED BUYER

      A:

      They are easy to drill and by not pre drilling you can orient the hole in various directions to align with your frame configuration.

      Answered on 3/25/2015 by Anonymous
    • VERIFIED BUYER

      A:

      LoPros don’t come pre-drilled for a good reason. If they did, and the installer wanted to use the pre-drilled hole, he or she would have to drill a perfectly matching hole in the receiving frame tube. That would require the use of professional machine shop measuring and centering tools most of us normal mortals don’t possess. Drilling that single, perfectly aligned retaining bolt hole is challenging enough doing it the easy way... after the LoPro has been inserted into the tube.

      Answered on 3/24/2015 by Anonymous
    • Staff Reviewer

      A:

      The reason we don't pre-drill holes in LoPros is that it's not likely to line up precisely with the existing holes in your cross member. When we assemble cross members we set them up in a jig and use a horizontal drill press to drill through pipe and LoPro shank. Depending on sharpness of drill bit, pressure of operating the press, etc the hole can wander a bit. Locked in the jig we still get a flush fit of the LoPro on a side rail, even if the hole isn't perfectly horizontal.

      Answered on 3/24/2015 by Clyde from NRS
    • VERIFIED BUYER

      A:

      I'm pretty sure the reason they don't come pre-drilled is so you can be
      sure they line up with pre-existing holes that may be drilled in your
      crossbar. But also, if you don't have pre-existing holes, the easiest way
      to get them to line-up is to drill them at the same time. I'd recommend
      doing this with a drill press to ensure the hole is straight and in the
      center (even though I did mine by hand - it's not exact).

      Answered on 3/24/2015 by Anonymous
  • NRS LoPro Frame Fittings

    Q:

    Can you drill these with a standard hand drill or do you need a press?
    Asked on 3/7/2015 by Mad for Waffles from Seattle

    1 answer

    • Staff Reviewer

      A:

      We use a modified press that drills horizontally, with the LoPro and pipe locked in a jig. Using a drill press is the most accurate way to do it. You want the LoPros on both ends of the cross member to be in the same plane and that's hard to do with a hand drill.

      Answered on 3/7/2015 by Clyde from NRS
  • NRS LoPro Frame Fittings

    Q:

    Which section of the LoPro has to be drilled in order to make them work (with your standard NRS aluminum pipe)?
    Asked on 3/7/2015 by Mad for Waffles from Seattle

    1 answer

    • Staff Reviewer

      A:

      The 2" long round stub on the LoPro is 1 3/8" in diameter. It inserts into the frame pipe and we drill a hole through pipe and stub to secure the two with a bolt and nylock nut. You can get a good look at the LoPro in this video - http://www.nrs.com/learn/hot-forged-lopros-oar-mounts.asp - Let us know if we can be of further help, 800.635.5202.

      Answered on 3/7/2015 by Clyde from NRS
  • NRS LoPro Frame Fittings

    Q:

    I am having a custom floor made for my cataraft which is currently in a different state so I cant look at it. Could someone tell me how far through you need to stick your frame pipe in order to have full grip with these? If I recall correctly, I only have about two inches of my floor pipe through on my cataraft yokes, so that only the black end cap is sticking out. I hope this makes sense to someone...
    Asked on 3/2/2015 by Rob from Dutch John

    2 answers

    • VERIFIED BUYER

      A:

      As long as the black end cap is sticking out, this should be fine. You can
      go right to the edge of the pipe. I do this to get full use of the side
      bars when setting up for multi-day and need all the room I can get.

      Answered on 3/2/2015 by Floater Bob from Colorado
    • Staff Reviewer

      A:

      Rob, I'm not sure that I understand your question, but here's some info. The stub of the LoPro that fits inside the frame pipe is 2" in length. The portion of the LoPro that grips the pipe when the U-bolt is tightened is 2 1/8" across. The raised ridges on the curved surface are 1 13/16" long. If you have further questions, please give us a call, 800.635.5202.

      Answered on 3/2/2015 by Clyde from NRS
  • NRS LoPro Frame Fittings

    Q:

    can I switch out my old lo pro fitting with the new with out changing original pipe length?
    are thenew low pro fittings much lighter than the new ones, if so how much lighter?
    Asked on 1/23/2015 by glenn from United States

    7 answers

    • VERIFIED BUYER

      A:

      I'm sorry, I have only used the new LoPro fittings so I can't compare them with the old ones. I can say I am very happy with the new LoPro fittings in all ways.
      Thanks, Kevin
      Sent from my iPad

      Answered on 1/30/2015 by Anonymous
    • Staff Reviewer

      A:

      Glenn, the new LoPros are 1/32" shorter than the old ones, meaning the pipe on each cross member has increased in length 1/16", not enough to really cause a problem. Here is the possible issue with replacing the LoPros. The old LoPros were cast in sand molds, so the stub that fits in the pipe was of an imprecise diameter. Also, the inside diameter of the pipe we bought varied a bit from order to order. This meant that we often had to lathe the stubs to get a good fit. The stubs on the new forged LoPros have a very precise diameter. Also, to ensure a consistent pipe ID we are now sticking with one pipe supplier and have purchased our own die for their extrusion process. The new ones will probably fit just fine, but they may not. A couple of people have reported that the new ones were too large for their pipe. If all your frame pieces were bought at the same time the fit should be the same. The only thing I can suggest is to give it a try. Remember, the new ones won't come with the holes drilled. The new ones are approximately 25% lighter than the old ones. Let us know if you have further questions, 800.635.5202.

      Answered on 1/23/2015 by Clyde from NRS
    • VERIFIED BUYER

      A:

      I substituted without changing length of pipe. Substantially lighter at
      least 40%

      Answered on 1/23/2015 by Anonymous
    • VERIFIED BUYER

      A:

      I have switched the two fittings interchangeably and I have both on my
      setup.

      Answered on 1/23/2015 by Anonymous
    • VERIFIED BUYER

      A:

      Yes, no problem. I have some old and some new Lopros so you could even swap a few at a time if you want.

      Answered on 1/23/2015 by Anonymous
    • VERIFIED BUYER

      A:

      The new ones are the same to the 1/16", I didn't put a caliper on it. The new ones are 11.75oz with no bolts or washers and holes drilled for the cross bolt. The old frame i have doesn't allow removal for weight. The cross bolt holes will have to be drilled in the new ones.
      Sent from my iPad

      Answered on 1/23/2015 by Anonymous
    • VERIFIED BUYER

      A:

      The new fittings that I got needed to be remilled. They were too large diameter. Assuming that problem has been fixed, I think the length should not be an issue. You will need to drill them though which should also not be an issue.

      Answered on 1/23/2015 by Anonymous
  • NRS LoPro Frame Fittings

    Q:

    What is the measurement from the inside edge of the shank to the center of the saddle mount. To ask another way, if I have a 60" wide frame and am cutting a piece of tubing to use with the LoPro's what length would I cut the tubing so that after adding a LoPro on each side the assembly would fit the 60" frame?
    Asked on 7/9/2014 by Framethrower from Fairplay, CO

    1 answer

    • CUSTOMER CARE

      A:

      You'll need to take 2- 2 1/16" off each side to accommodate for the Lo Pros.

      Answered on 7/10/2014 by Kyle from NRS
  • NRS LoPro Frame Fittings

    Q:

    What is the ID of the corresponding pipe?
    Asked on 6/10/2014 by Whaleskin from Salida

    1 answer

    • Staff Reviewer

      A:

      Our frame pipe is 1 1/4" Schedule 40, 6061-T6 anodized aluminum. The ID is 1 3/8" (1.375").

      Answered on 6/10/2014 by Clyde from NRS
  • NRS LoPro Frame Fittings

    Q:

    Will these fittings work if I were to want to switch out the older low pro fitting to these new ones?
    Asked on 4/5/2014 by SpeyFisher from Spokane, WA

    2 answers

    • VERIFIED BUYER

      A:

      Yes. They will work fine. I put the new ones on my frame and they look great. Update you oar towers to the new ones and you will have a great looking frame.

      Answered on 4/6/2014 by Anonymous
    • Staff Reviewer

      A:

      They would probably fit, but we can't be sure. Remove a couple of your LoPros and carefully measure the inside diameter of the pipe. The shank on these new forged LoPros will fit very snugly inside 1 5/8" inside diameter pipe. Back when your frame pieces were made the ID of the pipe we bought varied slightly, so we lathed the LoPro shanks to fit. We've now purchased our own pipe dies that the pipe manufacturer uses, so we have that consistent 1 5/8" inside diameter. Give us a call, 800.635.5202, if you have questions.

      Answered on 4/5/2014 by Clyde from NRS
  • NRS LoPro Frame Fittings

    Q:

    Well, you say they are 25% lighter but don't specify the weight in the specs. So what do they weight and what do the existing LoPro's
    weight? Also you should mention that they will only fit 1-5/8" diameter schedule 40 aluminum pipe. The schedule of the pipe refers to the wall thickness as I'm sure you know.
    The new LoPro's do look great. I just order a new style 8" oar stand and you finally put in a plastic bushing, right on!!!
    Asked on 2/16/2014 by JV from Hamilton, MT

    1 answer

    • Staff Reviewer

      A:

      JV, the new LoPros weighs 11.6 ounces. The old ones vary in weight, about 15.3 - 15.5 ounces. They are cast in sand molds, which leads to slag and protrusions that have to be ground off. Factory run pipe varies in inside diameter, so we often had to lathe the LoPro shanks to fit. Since the shanks on the new model are precise we've purchased our own pipe die that the pipe manufacturer uses, so we get a good fit. And yep, the nylon bushing, an idea that Bill Parks came up with, is a great addition.

      Answered on 2/17/2014 by Clyde from NRS
Displaying questions 1-9

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REVIEW SNAPSHOT®

by PowerReviews
NRS LoPro Frame Fittings
 
4.7

(based on 7 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (2)

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    (0)

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100%

of respondents would recommend this to a friend.

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Cons

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    • Was this a gift?:
    • No (4)

Reviewed by 7 customers

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4.0

LoPro for making my own frame

By Stoker

from Seattle

Verified Buyer

Pros

    Cons

      Best Uses

        Comments about NRS LoPro Frame Fittings:

        These are much better then the old style.
        Once I get my frame built I will write another review.
        My only feedback is directions on drilling and attaching the aluminum tubing/

        • Was this a gift?:
        • No
         
        5.0

        Great

        By Curt

        from WV

        Verified Buyer

        Pros

        • Nicely constructed

        Cons

          Best Uses

            Comments about NRS LoPro Frame Fittings:

            These things are great

             
            5.0

            Improvement over the Sand Cast Fittings

            By XR650Ryder

            from Island Park Idaho

            Verified Buyer

            Pros

            • Consistent size
            • Grip Teeth
            • Lighter
            • Nice appearance

            Cons

            • Hollow Stem

            Best Uses

            • Can Be Re-purposed

            Comments about NRS LoPro Frame Fittings:

            The 4 fittings I drilled were virtually identical. No longer will I need fittings for every piece of tube I own. I will Drill all mine in the future to maintain a 1.400" bolt spacing from the lip. Had to add a couple of undersized drills to insure the backside hole didn't walk off.

             
            5.0

            NRS LoPro Frame Fittings

            By Hue G

            from Applegate, CA

            Verified Buyer

            Comments about NRS LoPro Frame Fittings:

            These are more astheticelly pleasing than the older model. Time will till how they hold up, but I'm sure they will.

             
            5.0

            Lighter and better design than the old

            By Paddler

            from Sacramento, CA

            Verified Buyer

            Pros

              Cons

                Best Uses

                  Comments about NRS LoPro Frame Fittings:

                  Big improvement over old LoPro

                  • Was this a gift?:
                  • No

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