new seat rollers

Maintenance, accessories, operation. Anything to do with making your erg work.
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withnail69
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new seat rollers

Post by withnail69 » April 13th, 2021, 1:00 pm

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Today I received my new seat and rollers from concept.. No instructions included but I found them online. Either I am going crazy or the bolt on the left of the attached picture doesn't screw in all the way.. This confused the hell out of me as my old seat has that bolt screwed in all the way. Why wasn't this explained anywhere.. I decided that it was just designed to be like this. I hope I am right. Seat seems to be ok like that once the rollers are on the rail.. Please let me know if I am missing something!
47 yr old male. 108 kg. 5ft 8. 500m= 1:54.8. 1k=3:53 2k= 7:55.7 10k= 45:58

Cyclist2
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Re: new seat rollers

Post by Cyclist2 » April 13th, 2021, 8:01 pm

If it's the same bolt you removed, then the nylock nut should screw on all the way. In your photo I can still see threads on the bolt, so the nut should tighten down further. Maybe you have a bolt with banged up threads that isn't allowing the nut to tighten further. Did the other roller bolt/nut tighten down correctly?
Mark Underwood. Rower first, cyclist too.

withnail69
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Re: new seat rollers

Post by withnail69 » April 14th, 2021, 4:44 am

Thanks for your reply. Neither bolt tightened any tighter than the one pictured.. Both the bolts and nuts came with the new seat. The old seat was totally threaded. The new nuts have a kind of plastic thread inside. I think they are only meant to screw this amount. I will call concept today and check
47 yr old male. 108 kg. 5ft 8. 500m= 1:54.8. 1k=3:53 2k= 7:55.7 10k= 45:58

withnail69
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Re: new seat rollers

Post by withnail69 » April 14th, 2021, 5:39 am

Hmm ok they've just confirmed that this is the new design. I was scratching my head for a long time over this yesterday. I hope this helps someone else
47 yr old male. 108 kg. 5ft 8. 500m= 1:54.8. 1k=3:53 2k= 7:55.7 10k= 45:58

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c2jonw
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Re: new seat rollers

Post by c2jonw » April 14th, 2021, 7:04 am

New Design? Maybe they were referring to the roller shape or material. I can't imaging that the nut is supposed to be partially on as you show it. The plastic in the crown of the nut is there to prevent the nut from coming undone- it's called a Nylock nut and it works much better than a lock washer.
69 year old living in Waterbury Center, Vermont, USA
Concept2 employee since 1980! and what a long, strange trip it's been......and retired from C2 in October 2018!

mict450
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Re: new seat rollers

Post by mict450 » April 14th, 2021, 10:29 am

Looks like that nut has been buggered up! :o Ditch the crescent wrench (adjustable spanner in the UK?) & use a proper socket wrench.
Eric, YOB:1954
Shasta County, CA, small town USA

withnail69
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Re: new seat rollers

Post by withnail69 » April 14th, 2021, 12:17 pm

Wrench wasn't used for this.. Tried both Nuts and neither would tighten further than this. Either there was manufacturing fault or this is the new design as concept says. Either way.. These nuts weren't going tighter trust me..
47 yr old male. 108 kg. 5ft 8. 500m= 1:54.8. 1k=3:53 2k= 7:55.7 10k= 45:58

mict450
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Re: new seat rollers

Post by mict450 » April 14th, 2021, 8:22 pm

withnail69 wrote:
April 14th, 2021, 12:17 pm
Wrench wasn't used for this..
Allow me a stupid question.....are you trying to tighten the nut by hand?
Eric, YOB:1954
Shasta County, CA, small town USA

withnail69
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Re: new seat rollers

Post by withnail69 » April 15th, 2021, 5:23 am

Nope
47 yr old male. 108 kg. 5ft 8. 500m= 1:54.8. 1k=3:53 2k= 7:55.7 10k= 45:58

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c2jonw
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Re: new seat rollers

Post by c2jonw » April 15th, 2021, 9:38 am

I don't know what's going on with this but the nut should be fully tightened. Try lubing the threads. A new nylock nut will take some additional force to tighten down. If that doesn't work I'd use the old hardware. I worked in engineering at C2 up until 2 years ago.....
69 year old living in Waterbury Center, Vermont, USA
Concept2 employee since 1980! and what a long, strange trip it's been......and retired from C2 in October 2018!

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jackarabit
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Re: new seat rollers

Post by jackarabit » April 15th, 2021, 9:54 am

New seat from Concept 2 is warranted against defects in fabrication and assembly. Cross-threaded axle nut should qualify. To be fair, I’ll assume the adjustable wrench in the foto was used in an attempt to diagnose and correct problem not produce it? And you had it’s mate or a similar nut buggering appliance on the other end? So the nut oppo end of axle does turn? Keep at it and that nut should spin off easily after the axle threads clear the Nyloc insert. Pull the axle from roller bore, spacers, and end brackets, secure in padded vice and retest the proposition that the stubborn nut will not turn either on or off the axle threads. Don’t keep us in suspense about your findings. :D
There are two types of people in this world: Those who can extrapolate from incomplete data

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Rick
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Re: new seat rollers

Post by Rick » April 16th, 2021, 10:15 am

I just checked my relatively new rower (Jan 2021), which I would imagine has the newest seat fitment. As tightened from the factory, there are about as many threads showing outside of the locknut as your photo is showing inside. That nut is not tightened to where it should be. Either it isn’t tightened through the nylon washer or, if it can’t be tightened further, it’s defective.
C2 Padawan

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