Nobl

Grom Freeride Sled: 2020 Rocky Mountain Altitude XS 26" 7

2740 of 17392
(11 people)
Svinyard
4/16/2022 5:12am
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s1600 Rocky Mountain Altitude Carbon C70 FB.jpg?VersionId=ErvwUbc8E42aa7IMP
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Related:
Bike of the Day
Rocky Mountain
Manitou
ProTaper
Shimano
Stan's NoTubes
Maxxis
OneUp Components
Parts
Brand
Model
Additional info

Parts

Frame
Rocky Mountain
Altitude Carbon C70
XS w/ 26" wheels. Ride9 option 3.
Frame: Rocky Mountain Altitude Carbon C70. Misc: XS w/ 26" wheels. Ride9 option 3.
Rear Shock
Manitou
Mara Pro
210x55 for 150mm of travel. Stock rocky eyelet hardware working well. Running 90 PSI in Mara Pro with all compression/rebound open.
Rear Shock: Manitou Mara Pro. Misc: 210x55 for 150mm of travel. Stock rocky eyelet hardware working well. Running 90 PSI in Mara Pro with all compression/rebound open.
Fork
Manitou
Mezzer Pro
160mm Mezzer Pro has roughly 20PSI in Air spring and 35PSI in IRT with all compression and rebound open.
Fork: Manitou Mezzer Pro. Misc: 160mm Mezzer Pro has roughly 20PSI in Air spring and 35PSI in IRT with all compression and rebound open.
Headset
Cane Creek
FORTY-SERIES ZERO STACK
Headset: Cane Creek FORTY-SERIES ZERO STACK
Handlebar
Other
ProTaper JUnit
680mm wide kids bars
Handlebar: Other ProTaper JUnit. Misc: 680mm wide kids bars
Stem
Other
ProTaper
35mm Length : 31.8 Clamp Diamter
Stem: Other ProTaper. Misc: 35mm Length : 31.8 Clamp Diamter
Grips
Other
ProTaper JUnit 26mm
Kid sized grips
Grips: Other ProTaper JUnit 26mm. Misc: Kid sized grips
Brakes
Hayes
Dominion A2
With Kids SFL Levers (Small Finger Lever)
Brakes: Hayes Dominion A2. Misc: With Kids SFL Levers (Small Finger Lever)
Brake Levers
Hayes
SFL - Small Finger Levers
Kids specific levers
Brake Levers: Hayes SFL - Small Finger Levers. Misc: Kids specific levers
Shifters
Shimano
XT 8100
Mounted to Hayes Peacemaker
Shifters: Shimano XT 8100. Misc: Mounted to Hayes Peacemaker
Rear Derailleur
Shimano
XT RD-M8100
12sp
Rear Derailleur: Shimano XT RD-M8100. Misc: 12sp
Chainguide
Other
Rocky Mountain Spirit Guide
Chainguide: Other Rocky Mountain Spirit Guide
Cranks
SRAM
X1 155mm
Cranks: SRAM X1 155mm
Chainrings / Sprocket
Other
Wolftooth Switch 30t
Chainrings / Sprocket: Other Wolftooth Switch 30t
Bottom Bracket
SRAM
PF92 DUB
2mm spacer on drive side
Bottom Bracket: SRAM PF92 DUB. Misc: 2mm spacer on drive side
Chain
Shimano
XT 8100
Chain: Shimano XT 8100
Cassette / Rear Cog
Shimano
XT CS-M8100 12-Speed
Cassette / Rear Cog: Shimano XT CS-M8100 12-Speed
Pedals
Crankbrothers
Stamp Composite Small
Pedals: Crankbrothers Stamp Composite Small
Front Rim
Stan's NoTubes
Arch MK3 26"
i26mm
Front Rim: Stan's NoTubes Arch MK3 26". Misc: i26mm
Rear Rim
Stan's NoTubes
Arch MK3 26"
i26mm
Rear Rim: Stan's NoTubes Arch MK3 26". Misc: i26mm
Hubs
DT Swiss
DT350
Microspline
Hubs: DT Swiss DT350. Misc: Microspline
Spokes
DT Swiss
Competition Race
Spokes: DT Swiss Competition Race
Front Tire
Maxxis
Minion DHR2 2.4 26" 3C
Front Tire: Maxxis Minion DHR2 2.4 26" 3C
Rear Tire
Maxxis
Minion DHR2 2.4 26" DC
Rear Tire: Maxxis Minion DHR2 2.4 26" DC
Saddle
SDG
Fly Jr.
Saddle: SDG Fly Jr.
Seatpost
OneUp Components
V2 150mm Dropper
240 PSI - works great for 80lb 10yro
Seatpost: OneUp Components V2 150mm Dropper. Misc: 240 PSI - works great for 80lb 10yro
Seatpost Clamp
Other
Stock Rocky Mountain
Seatpost Clamp: Other Stock Rocky Mountain
General Info

General Info

Model Year
2020
Model Year:
2020
Riding Type
Freeride
Riding Type:
Freeride
Weight
28 lb 8 oz (12927 g)
Weight: 28 lb 8 oz (12927 g)
Additional Info

Custom kids build with Manitou/Hayes/Protaper for my 10yro. The adjustability range of the suspension works really well and is significantly beyond Fox's in our testing when dialed in for an 80lb grom. Fox equipment was significantly overdamped. Fantastic freeride bike for a kid that goes hard and still has to pedal back up. Home build down to the bearings. Works with both 26" and 27.5" wheels. Likely 27.5" (Reynolds Beauties) for race days and 26" for Freeride team days.

Additional Info:

Custom kids build with Manitou/Hayes/Protaper for my 10yro. The adjustability range of the suspension works really well and is significantly beyond Fox's in our testing when dialed in for an 80lb grom. Fox equipment was significantly overdamped. Fantastic freeride bike for a kid that goes hard and still has to pedal back up. Home build down to the bearings. Works with both 26" and 27.5" wheels. Likely 27.5" (Reynolds Beauties) for race days and 26" for Freeride team days.
Svinyard
4/16/2022 5:12am
2740 of 17392
7 comments

View replies to: Grom Freeride Sled: 2020 Rocky Mountain Altitude XS 26"

c50 PXL 20210101 190302770 2 1641176378
cheapondirt
2 years ago
That's real nice! Since you mentioned doing the bearings, any specific tools used for that? I'm thinking particularly of the blind chainstay ones.
avatar.png?VersionId=TkOXSLqxgAC412Y 1F6UyzOaMSkN
Svinyard
2 years ago
Yeah frame was used and I wanted to get fresh bearings in all of it. The only bearings that are blind are the two for the lower main pivot. The chainstay bearings etc can all just be pressed out from behind. I used the AltAlt bearing set to do almost all of it and certainly re-install them all. Rocky Mountain has a decent manual with drawings that show the exploded view, bearings and also torque values.

1- Chainstay bearings, linkage bearings: The AltAlt can press them out
2- Main pivot blind bearings - I used a blind bearing puller from Motion Pro and its smallest collet. Worked great. That being said, its an expensive too. Thankfully there is a metal spacer between the two bearings. It has 4 notches in it (two on each side) that a flathead screw drive or other punch could be used to slowly knock them out. AltAlt does the install. When you install, do the drive side first and don't overpress them as the spacer needs to fit in there and it does provide some preload on the bearings. You don't just smash both bearings in all the way otherwise they are overloaded.

3- The shock eyelet bearings - these are easiest to remove with a vise with softjaws (not the add-on softjaws but legit sawjaws built in or a simple wood vise). You clamp the eyelet and rotate it until the bearing cup comes out. Then you can use the AltAlt and the metal spacer to press out the bearings and install them.
2
c50 PXL 20210101 190302770 2 1641176378
cheapondirt
2 years ago
Thank you for all the details! I'm planning to do bearings and paint at the same time next winter.
c50 Deer Valley Finish Line Jump
Fox
2 years ago
Great job Dad and whoever else was/is involved in this build. Finding good rides for small size light weight shredders can be challenging.
3
avatar.png?VersionId=TkOXSLqxgAC412Y 1F6UyzOaMSkN
Svinyard
2 years ago
Thanks man. Its hard to find any kid bike these days let alone something that's solid. Thankfully the Manitou/Hayes/Protaper/Sunringle group have some super dads on their product development teams that are making Kids stuff. Its so legit.
3

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