Fork sizing

[2WheelsNot4]

I'm in a state of confusion over something that i noticed while sourcing a replacement fork for when my current goes off to be serviced.
Premise for it is i thought instead of being bikeless while its in, why not buy a 2nd fork so i can easily swop it around. The 2nd fork can live as a spare should anything happen to the original.

Looking around for something not too expensive I've decided a Yari would fit the bill. Sturdy enough for an ebike but within my price range of about 400 quid.
Taking a look on wiggle(and CRC) they have them within my budget at around about 400 and i thought it a simple matter of a swop over right up until i spotted this - CROWN OD 59mm
So now im a bit confused there's another requirement i hadn't figured on, and while it probably means nothing at all, im now worried im going to buy the wrong damn thing thought sizing inexperience.
I'm, thinking if its there there must be a reason for them to include that bit of info.

For years Ive used 1 1/8" and with that its a simple swop around because they're all the same.

So are all tapered forks od59mm or is this something i should be concerned about ?.
Bike is a 2022 Scott Genius eride 920, Front is currently a Fox 36 rhythm 15x110mm

The other thing is this boost stuff. I seem to remember seeing it in relation to this bike/fork, but now i can't find that info so i don't know. It would be nice to have the correct info before i hit the buy button.

The two yari Ive been looking at.

Yari RC Boost Fork

Buy your RockShox Yari RC Boost Fork - Suspension Forks from Wiggle. Our price . Free worldwide delivery available.

www.wiggle.co.uk

And this one ,that has the extra bit of info about the 59mm crown OD

Yari RC Forks - Boost

Buy your RockShox Yari RC Forks - Boost - Suspension Forks from Wiggle. Our price . Free worldwide delivery available.

www.wiggle.co.uk

Also if aanyone knows the bloody difference between these two please say. they appear to be the same fork, but ive no idea why there an RRP difference in price.

 

[thebarber]

Servicing your forks is an easy job done at home.
You'd be better off buying the gear to do this.

 

[HarryJune]

The second set are e-mountain bike approved.

 

[2WheelsNot4]

The second set are e-mountain bike approved.

Ahh, that accounts for the extra

Servicing your forks is an easy job done at home.
You'd be better off buying the gear to do this.

I probably have all the kit, allen keys, spanners, expensive torque wrench, but these day I'm not having confidence in my own abilities. I feel going to somewhere like TF Tuned means its all done, there's not going to be any problems later.

One of the reason for this is not knowing how it all goes together. Forget the instruction manual, words and simple pictures are pretty rubbish for this sort of thing, and what i would need is to see plenty of vids, take advice at stages in the work, or have someone capable and experienced to work with me doing the actual tasks. Or to check after that I haven't made a complete arse of it. Theres always some small fine print in these things. People say like WHAT!!, you didnt fold out the whatever ??? well no wonder it didnt go together smoothly, or WHAT!!, you didnt apply a smidgen of grease on the stanchions before assembly???, no wonder it damaged the seal.

That kind of thing.

I'll look into and have another think. See if i can watch some vids on servicing this specific fork. Do a bit of research, take a bit of advice and spend a little time before I make the decision.
One thing i have thought about and have to take note of is what happens if the delivery company makes a balls up and loses the fork. Insurance costs on sending, a bit of worry hoping all goes well with the courier etc etc.

Just I suppose fear of the unknown.

But anyway, back to the 2nd question. What the heck is this 59mm crown OD all about ?, that a standard size or something special i should take note of.

 

[RustyMTB]

Lower leg servicing is genuinely straightforward with basic tools. Fear of the unknown is overcome by learning & there is a wealth of knowledge out there for the asking. A backup fork is really a false economy.

 

[Mikerb]

both forks are OK for EMTB but the first one is the older Solo Air model, and the ad does not in any case even allow you to specifiy 29 rather than 27.5, so I would ignore that ad. The second ad is the latest Yari using the Debonair air spring. Ignore the crown OD. Is just saying it has been beefed up a bit.
Note that even the second ad does not specify the fork offset which you would ideally need to be the same as your existing fork.

Boost as far as a fork is concerned refers to the 110 mm ( as opposed to 100mm) front hub spacing. On the rear of the bike a boost hub is 148mm as opposed to non boost 142mm.

 

[2WheelsNot4]

OK, you've talked me into it.
Just watched a service vid for a fox 36 rhythm and there's nothing to it really. And in truthfulness i have in the past serviced bombers. Just got into the thinking that fox was uber technical, but it's pretty much the same system of disassembly and reassembling.
Only thing I'd be aware of, not featured in the vid I watched, was torque torque settings for the leg nuts and air cap. I'll need to know those, and buy an aircap sized socket.

I could do with this type of task, been sitting with my head up my arse for too long, putting things off on bike maintenance,and also designing and making cabinets and other nice bits of furniture. I think you can easily get into a rut, and before you know it several years will drift by.
Probably this servicing is just the kick I need to get the ball rolling again.

 

[RustyMTB]

That's the spirit! Now jot down a spare parts list for when you strip threads, lose washers, cut o-rings...

 

[GolfChick]

Are you in the U.K.? Is your fork due it’s intermediary service or the full one? How many hours has it done? TF tuned it’ll be done in say max a week so I don’t see why you’d bother with £400 for a week. Depending where you are could be that there’s another option nearby. I have a guy 9 miles away who did mine, dropped in at 9am and done by 3pm.

 

[RustyMTB]

Things like this boil down to how you value your time/money/skillz. To service a fork will typically set you back £30 in parts & take an hour or so, assuming you have tools to hand. To get it done professionally is about £100-£120 in the UK & you still have to take it off the bike, send it over to the tech & then wait for them to get round to it.

For me, the equation is easy, I get to ride the same day & know it's been done properly, that's not necessarily the same for other people who are busy, inexperienced, not confident etc.etc. & that's fair enough. All I would add is that if you can, then it's not a difficult thing to fold in to your maintenance schedule.

 

[Mikerb]

I do all my own servicing but do not bother servicing forks simply because the cost of the various oils/grease/seals etc is 50% the cost of getting it serviced by someone like TF.........and they do a full service rather than just a lower leg service which on Forks with sealed bladder dampers and oil free airspring assemblies etc makes eminent sense. If you are within reasonable travel distance such that you could drop it off on a specific day Im pretty sure you could make an appointment to get it done same day or at least in a couple of days. Whilst the fork is off you can service the headset and front wheel hub etc.