Okay- got the air shaft to convert my 100 Bluto to 120, plus the RCT3 Damper. Anyone have any info on the conversion? Oil volumes/ weights? The "service manual" link from the SRAM page for the Bluto doesn't even have the Bluto listed on it. Treat it like a SID?
Fat907- what grease did you use on the Air Shaft? I have some Slick Honey, but the manual says only the RS/ SRAM Butter, or some military grease. Seems like for 20 less than stock on the damper side, you could just pull the old damper and insert the new one without changing fluids... For the air shaft, seems like I just need to remove the rebound adjuster knob and lower bolt on non-drive-side, drain oil, remove the lowers, remove the retaining ring, pull the air shaft out, grease up the new one and install the bumper and floating seals from the old one, and re-install, then add fluids. That's it?
As I understand it, every 10mm increased in fork extension equals ~1 degree decrease in head angle. So working from a 25% sag, compare that Bluto fork length to your stock fork length, consider how increased sag would affect the current feel of your bike, and go from there.
In my experience, more is not always better, especially when you are adding suspension to a frame that is not suspension corrected. Most fat bikes are not going to be suspension corrected unless they are a fairly new design...
My Lurch arrives tomorrow, I'm probably swinging toward 80mm, 100mm if I want a little slack.
I’ve been running the Bluto around Moab for about 2 months. For me a front suspension fork was the one thing really preventing me from riding the fat bike in the dirt more. The Bluto really helps close the gap between just a snow bike and a bike I take on summer trails.
That said, I think it’s one of the worst feeling RS forks I’ve owned. With 90 psi well bellow the recommend pressure for my weight I find it’s super stiff and has tons of stiction. When I drop the pressure down to a point it moves on small to moderate size bumps it bottoms outs too easily.
I’m not very knowledgeable about suspension stuff. For those that are, do people think this is more of an issue related to the damper or rather a lack of lubrication?
Are you running any tokens? Which Bluto model do you have?
I have the 120mm and it came stock with no tokens and I blew thru the travel and woudl bottom out hard on bigger drops. I now have two tokens installed and it is perfect. I was able to lower the pressure a bit which gives it even better small bump compliance, but it ramps up quicker and doesnt bottom as easy.
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