2018 Trek Roscoe 8 Rear Boost 141 Hub Upgrade! 

I updated the links to the rear Hope Pro 4 hub and the conversion kit in the video details, make sure to select the 28H version of the rear hub

Exactly what i needed to see. I remember watching this video awhile back but now watching it again i see you have the exact hub size i do. Thank you again toogy🤘

This made my day, didn't realise Hope did a conversion kit and those Forumla hubs are far from optimal and I've heard a lot of people slate those specific ones.

My Giant Fathom 1 has the same hub, this video was a lifesaver!

Thanks so much Toogy, this is the next item on my hit list for my Roscoe, so this really helped.

Just installed the Hope SS hub on my trail bike. Nice stuff

Hey, I have final solution for everyone! If you will buy ANY hub for thru axle with Boost (like 12x148) with possibility to replace end caps for quick release, you will get 141 mm width. End cups will adjust width from 148 mm thru axle to 141 mm QR. I have done it with Mavic CrossMax 29 Boost 12x148 (R2468110) and Mavic QR ID360 end cups 9x135 (V2510801). Final width is 141 mm. And you can do the exact same with DT Swiss, Hope, Bontrager or any hub with replaceable end cups. Mavic is probably the cheapest, you can do it for around 140 EUR. Other mentioned brands are 180 EUR for Bontrager and 220 EUR for DT Swiss and Hope.

Thanks so much for the video. This is exactly the kind of info I was looking for in order to upgrade my Roscoe 7.

This video was very useful, updating my sons Hub, Giant Trance with the QR141. Thanks

Lacing wheels is tedious, but extremely rewarding. There are a ton of videos here on RU-vid that will show you how to do it. Hope hubs are extremely sturdy, but out of my price range, where function and cost are concerned. It sounds great though.

I've got to do that to mine. Just got it out today and it drove me crazy. Thanks

The Trek Stache has the same hub and I am also upgrading the rear hub to the Hope Pro4. Love my Hope Pro2 hubs on my El Monsterachi. They are going on 4 years. Excellent hubs.

This is soon a Roscoe 9 :D My Roscoe 8 2019 is stil approx 14 days out. CAN'T WAIT!!! If I want to at some time change hubs, I want to go for a Onyx silent Hub! Instant engagement and completely silent! think that's so nice! Enjoy natur 100%

yooo that so helpful, been looking for this for too long now. Thanks

Thank you so much for this vid. I have a 2020 Roscoe 7 and it has been hard to find a fitting hub. I love the bike but the rear hub, Trek: I CANNOT BELIEVE THAT YOU HAVE CHOSEN SUCH A SHITTY BAD FORMULA HUB QUALITY ON A SUPREME FRAME LIKE THIS. I sent a mail to Trek about this because I am so disapointed. I'm an engineer and worked a lot with materials and metals, the metal they have chosen, not to mention the unbelievable bad dimension quality, it should have been a mass law suit. My hub is completly destroyed and I havent ridden my bike for 2 straight months in the wait for Trek to respond. They didn't so I am getting a Specialized next time. It is such a shame because the Roscoe has such an incredible fun frame! Still, I'm keeping the bike and I am upgrading with the Hope hub my self, thank you :)

That thing is sweet! 👍

Nice upgrade. I’ll be doing the same to my Roscoe 7.

That's a loud hub. I like the quieter ones and if I'm rebuilding a wheel with a new hub that's exactly what I would get. That did look great and the engagement was much improved.

OMG Toogy, you just solved the issue I have with my Roscoe 7. The slap in the hub drives me nuts. I will look at the Hope option you chose, it looks like a good one. Thanks my Roscoe Brother.

Great video. Having the same issue with my 2019 Roscoe. Sounds like the conversion kit will do the job. Thank you

Just ordered an Industry 9 Hydra rear hub for my Roscoe 8. Can’t wait to get it laced up! That stock rear hub is ATROCIOUS! Just an FYI for anybody looking to upgrade a Roscoe to save you some headache, I9 offers their hubs in boost 141 qr so you don’t have to mess with converting a 148 hub, and they offer all driver bodies so they’ll work on any drivetrain. They also offer their hubs in 28h so it’ll work with the stock Bontrager Line 40 rims.

Got a Cannondale Cujo 1 and it's also running 141 QR Boost (and has the Formula hubs too). Not the end of the world, but it does sure make upgrading the wheels trickier.

Aaand my Formula 141 QR hub also started doing everything shown in the video. The driveside cone came loose during a really wet and dirty ride and got filled with water and abrasive materials. Took it apart and regreased everything but apparently the freehub body is basically shot now. Good thing I was planning on a wheelset upgrade anyway.

nice vid! i was going to get one of these but i decided against it and got the mason 2 from DB instead. comes with a rock shock gold and i liked the frame a lot more.

My Giant Stance came with a QR141 that started making the exact same sound. I assumed it was a cracked bearing or something. Anyways, I'm trying to replace it and I'm glad I found this video because I wasn't finding any wheels that were listed as 141mm. Thanks.

Thanks for this video! I have 2017 trek stache 5 and found that my rear wheel has some weird play left and right. Got to the point that can't really put axle back in order :) after cleaning. My hub is boost 148 12mm axle which came with the bike, so many washers and different nuts, if its too tight cant spin the wheel. so frustrated with that cheap parts.

Good to see I have an option for my Roscoe. I just got mine back after blowing out the rear hub (made it freewheel both ways). Trek did a great job replacing it under warranty though. Wondering how many they will replace. Thanks for the videos, cool to see upgrade option on my exact Bike.

Trek Roscoe 8 Toogy Edition! looking good.

I have the Salsa Timberjack. Same hub. I'm definitely going to upgrade. Only difference is I may replace the dropouts to use the regular boost 148. But if i9 hubs have that same conversion I may stick with 141!

Ahhhhhh so it's not just my Roscoe with this issue!

Just got my pro 4 installed on my Salsa. Basically same setup as yours. Boost 141 and all. Formula hub. A lot more slop than I was expecting but it sounds cool!

I have a X caliber 7 2018 and it also uses this hub measure, so thanks for the information and the video!

Just ordered rear wheel hope pro 4 boost 148 that I will install in my Marin San Quintin 1 that has a 141 qr boost. Can't wait for the massive improvement because the stock hub is just rubbish 🙄. Thanks for this info Mate. 👍 I already bought the qr conversion kit and just waiting for the wheel to arrive.

Hello, excellent job, I also have 141 boost should do the same, you yourself have changed the core? I see the tire is the same Sun Ringlé, right? 😅

For anyone interested in upgrading there Bontrager hub to microspline; I have developed end caps to allow fitment in 141 QR.

Hi) And you can put 12x142 if you sharpen the spacers yourself? And whether it will be possible to adjust chain line?

Cant wait for Trek to put a thru axle on X Caliber

Thats exactly what I need ¡¡ thanks dude ¡ i hope to find something form Shimano ¡

I got a roscoe 8, had to put the upgrades on hold cause I'm in the process of buying a supercaliber 9.7, can't wait until she is home, naming her Kelly, kelly caliber, my roscoe 8 is called Tracey trek!!!

Yeah cool video, I did same thing with my Excal 8 except I used a DT 350 Hub and you can go with an I9 hub to. I had wheelbuilder do mine . Good work no worries

Great vid. Have the same issue with my Cannondale Trail, and those 141 QR hubs are hard to find... One little thing I saw in the video: the valve is not where it should be in relation to the spokes, LBS should have done a better job there, especially when you expect them to be the experts in the matter

thanks for the video, I am learning a lot. One question: Can you fit the 29's on a medium size frame rosco 8? or is just on the XL frame?

Hi, thanks for the videos. Enjoying them a lot. I just wonder is it possible to convert 141 mm hub to 148 by changing the inners parts or so?

Doing the same thing with mine but I chose the DT 350 148 and QR end caps. Received the hub today and trying to decide if I want to buy a new rim or relace the old one.

Hi! Going to make the same upgrade buying a complete rear HOPE FORTUS 4 PRO wheel for my Roscoe. Did the wheel work well using HOPE HUB238 kit adapters?

Did you have to shim the brake rotor on the hub out at all so it would mate up with the caliper a little better? I see adapters for the front and rear Hope hubs for rotor shimming is why I'm asking. I too had my my rear hub grinding on me too. I overhauled it, and found the drive side is not sealed up very well, and had all kinds of gunk in there. Its better now, but I know it wont last. My front hub took a dump on my Roscoe this weekend, it too was grinding. When I tore it down, I was missing 1 ball on one side, and 2 on the other. It has NEVER been tore into, that was like that from from Formula Engineering Inc. (Taiwan) if anybody wanted to know. Front hub is a DC511. I want to replace my front hub as well. The grease (what was left in there) was rusty looking. But most likely from dust from the trails getting in there. I'm excited to upgrade my hubs into my factory Sun rims just like you did. Thanks for the video!!!

So it’s the Shimano one oh! Well that’s a lot easier to find maybe...I hope

Helped me! My rear hub was done after about 20 miles. Poor poor quality.

I realize this video is a few years old, but if by any chance, you're still getting your service done by the same LBS... beware? As many have already pointed out, the cassette was indeed loose. If the shop installed it, that's "very bad". Additionally, they goofed the wheel build. Valve hole is incorrectly clocked with the spoke groupings. This is not as bad as a loose cassette, but that shop charged you for a service that was executed subpar. Being that you are seemingly quite knowledgeable and care about your bike, I just wanted to mention this. In any case, this is a very informative video--thanks!

Think a rear hub will be my next upgrade to my X-caliber.I have noticed the slight engagement slop on technical climbs & had a slight rumble noise from rear hub bearings. I cleaned & lubed them for time being.

I just noticed this on my Roscoe 8. The hub is sloppy. Looks like I'll be doing the same upgrade.

Thank you for the awesome video. I am trying to upgrade the rear hub of my xcaliber 7 2021 with Hope Pro 4. For your Roscoe, did you have to change the spoke length with the replacement hub?

Super helpful bro I just for my 2020 Roscoe 7 And I want to upgrade is there anything else besides Hope 4 Since you made this vid ? Found the Hope 4 for 200 bucks but not sure of there is something less expensive that works Also can you recommend riser bar that suit the Roscoe

Hey Toogy, I'm inspired by this Hub upgrade. Unfortunately, the links in the description above are no longer valid but I wanted to ask if you could update us on the SKUs of the Hope hub and adapter kit components, if you still have that information somewhere? I looked on ChainReactionCycles for these parts and found sku646877 & sku261443.

Changed to Hope Pro4 based on this video. The original skewer sucks badly. Hope make a quality skewer too.

Unfortunately I discovered that shimano style cassettes creak like crazy on hopes freehub bodies. I'm going to have to experiment with grease to see if that solve the problem.

I just broke the axle on my backup raceface wheelset. Apparently that axle isn't very strong and probably depends on the through-bolt for strength. Just ordered DT 350's with DT XM521's. I am wondering of those of us who are bigger guys (230) shouldn't cut the ends off a maxle and insert it into the axle prior to putting the QR caps on.

You seem to be pretty familiar with the Roscoe 8. If I’m changing out my groups set do you know exactly which bottom bracket I need to get ? Press fit or thread on ? Also When I get a new Hope Pro 4, What’s the difference in the steel and aluminum Shimano adapter ? Plan to change my 2018 sram nx to SLX 1x12

Can you replace and upgrade JUST the cassette body on the original boost148 hub to add a larger cassette for more gears?

Maybe a dumb question but say I get a hope hub and build a wheel, so I now need a new cassette and maybe drivetrain? Or can I just remove the stock cassette off my roscoe and put it on the new hub and wheel?

The hub you fitted would it take a micro spline free hub on a Roscoe 8

Hi, i currently riding 2020 Cannondale Trail 4 equids with Shimano MT200 Boost 141 QR with 32H (spokes). Do you think this set up will work for me if i want to upgrade my rear hub? Thanks

Why is there this 7mm difference between corresponding QR and TA standards? Is it just that with TA the "locknuts" (as in "O.L.D.", but these are just endcaps with most hubs nowadays) seat 3.5mm inside the rear triangle, and QR "locknut" surfaces seat flush with the frame?

My gt avalanche 2020 uses boost 141 you think the hope conversion kita used here will work?

What company Cassette did you use. Does the Cassette have to match with the rear hub?

Halp, is the Hub238 conversion kit diffrent from the Hope QR endcap kit, do I need either one, or both???

Thank you

Thanks bro..

Hey Toogy, Im looking forward to get a roscoe 7 next month, but i notice this boost 141 thing... and this video just solved it, only cuestión is if its a regular qr 9mm axle on any 148mm hub??

So I was just about to place the order for the hub and there are options.. I have an eagle nx 1x12 and that would be the shimano driver i think and the other option is steel or aluminum!!! What do I pick for all the options?! Thanks!

Need help! What about the same problem but on the front wheel? Alpkit Sonder rigid fork have the same weird QR Boost standard (9x110mm) and I do not find any QR Boost hub on the market. Is there any posibility to convert a boost front hub into a QR boost?

What size bicycle spokes have you been supplied with?

I've noticed in the description you've linked the HUB238 but also QR end caps...do I need both of them or 1? may have missed you installing 2 different sets of caps..

U were smart to save money by just getting black to match and keeping the front stock. I took a different path and got blue. Which ment I had to get 2 brand new wheels built to match front and back just to get this GX Eagle 1x12. I just seen a video on the 2019 roscoe and it comes with the NX Eagle 1x12. I thought it was funny being that I just spent more on this 1 upgrade then my bike cost out of the door. Basically just to have a 12 speed and the 2019 comes with it. I know I could of got the NX eagle and kept my black hubs but I went blue and got the GX which changed everything. I could of saved here or there but I just went all out even getting blue spoke nips for $20 more. Ha oh well, its gonna look sickening. Today i ordered that exact chain guide u put on in your bike last video. Along with all mountain style frame protector stickers in camo. I actually wanted to ask you if the chain guide rubs at all when in the highest or lowest gear when the chains not exactly straight

I have a Roscoe too. My hub is so badly wear out. My freehub has some movement on it. And i cleaned and lubed all the parts. It didn't really help. But i don't have so much money to spent on so high end hub. Is there any hub with Boost 141mm spacing to my frame that is like under 100€?

Is this a Shimano free hub? Or Sram free hub? I have a Roscoe 7 and want to do the hope hub. But not sure which one to get specifically

Do i need the hope pro 4 mtb rear hub-boost 148mm × 12mm for my trek roscoe 8

So I can confirm that the 10mm axle I got will work. Now I just need to order the hub.

And here I am trying to upgrade my 6 to a Rapid Drive. Are they really that bad?

Omg, i need help, the hub in the link you posted is 12/148 but the replacement washers it says "convert your hope pro 4 10mm to 141" so hope pro 4 is 12mm or 10mm?

Overall how much did this cost and was it worth it?

Thanks for posting this. Why just upgrade the hub and not the whole rim?

Is this same hub as Trek Xcaliber 8 2021 model?

Hey toogy there are 3 options on ebay which one do I choose? Freebody hub: Shimano aluminum, shimano steel or sram xd?

Why did u upgrade it drivetrain to slx. Was there anything wrong with it old on??

Would hub238 end caps fit other hubs like Dt240s?

Shimano Altus FH-MT200-B 32 CenterLock QR 10x141мм Novatec D472TSBT-B5-11S все что я нашел пока что :)

Did you re-use the skewer ? because if i understand boost 141 is a 141×5mm qr, and the endcap conversion are 9mm so 141×9mm qr ? Or you buy a new skewer ? (Sorry for my english, i'm french and i want to do the same on my roscoe 7)

Hey mate great contents, questions is the original cassette fit ok in that hope hub, was there any mods to it? Thanks

did you change the cassette? stock is PG and not XG driver?

Did you upgrade the front hub?

So im gonna pull the plug, and upgrade the shitty formula hub to a hope hub...Any other suggestions or tips for the hope hub? Also, how is the hub in general ..i was looking the hope or the dt swiss 350..

Thanks, same problem here. Just wondering how much you spent on on labour/ how many hours it takes a mechanic to install? Just wondering if I'd rather replace the hub or just the whole wheel. Cheers

how much does your bike shop charge to do this if you dont mind me asking

Hi. Just wondering why you only replaced the hub rather then get a whole new wheel or wheel set? I have been looking at the same upgrade but once I pay for labour and new spokes to build the hub into my existing rim, the cost is about the same as buying a hope fortus 35 complete wheel. Thanks

Is there a website showing all the wheelsets or hubs that are 148 that convert to 141 QR?

Hi I’ve recently purchased the same bike 2nd hand, 2 days later the the rear hubs gone. I’m new to all this but going to try to look for an aftermarket one as I don’t have the money to do it brand new... So I’m looking for a hope pro 4 148x12 boost, 28 hole, shimano hg? Not sure what the shimano hg is as I don’t see many there mostly xd!!!

Did you reuse the factory skewer? Is it still 9mm? I’m wanting to do the same thing you did

Have own a few Trek, and first thing that was ripped off the bikes: the awful Bontrager made wheels. Either Alexrims or Mavic and will do the trick. Sunringle are great rims but seem to use an odd ball axle that are a bitch to work on.

sir please help me how to convert quick release to thru axle