Mountain Bike Reviews Forum banner
1 - 20 of 21 Posts

·
Registered
Joined
·
232 Posts
Discussion Starter · #1 ·
So i'm sold on the adjustable seatpost and was looking for some feedback/opinions on what's available for the 27.2 post. The AM forum had a pretty good thread on it, and the most appealing solutions are the Gravity Dropper and the AMP. The Rase, has more drop than I need for my riding with 9" and cost and weighs more. I like the joplin, but apparently CB pulled the plug on the 27.2. Thoughts, other options, personal experiences?
P.S. can you take the cover off the GD?
 

·
Registered
Joined
·
70 Posts
There used to be a HiteRite spring that bolted to the 27.2 post and the bolt for the clamp on the seat tube. The guy is out of business now and only rare finds on ebay. I had one back in the 80's that was just great when mixed with a QR seat post clamp. It was way cheaper than the Joplin, but there was no remote to use.
 

·
Registered
Joined
·
1,519 Posts
I like the GravityDropper Turbo. My cover is on but I'm sure it can be taken off. Once you get used to it it doesn't look bad. Been running it 1 year and just recently had to replace the cable other than that it's been great. I also used the Speedball/Joplin before the GD and it blew up twice in 1 month.
 

·
ride
Joined
·
5,274 Posts
I'm a fan of the Gravity Dropper. I've been on a normal GD remote for a few months now. I wouldn't run the GD without the boot. It's important to keep it greased and running smoothly. Without the boot, dirt/dust is more easily introduced and will make it feel sticky.

I like GD because A)they work well and B)I like supporting small business like Wayne's (Gravity Dropper).
 

·
Nature Rider, Not MTBer
Joined
·
2,695 Posts
ignazjr said:
I'm a fan of the Gravity Dropper. I've been on a normal GD remote for a few months now. I wouldn't run the GD without the boot. It's important to keep it greased and running smoothly. Without the boot, dirt/dust is more easily introduced and will make it feel sticky.

I like GD because A)they work well and B)I like supporting small business like Wayne's (Gravity Dropper).
I've been using a GD since 2005 and agree with ignazjr's points. I won't ride without my GD!
 

·
Registered
Joined
·
1,001 Posts
I have been riding with a RASE post on my 5spot for over 3 months now and love it. I had a Joplin on my old bike and that was good too. I have the Rase set up with about 6 inches of adjustability (there is a max height set screw) and it rocks. That extra 3 inches of drop over my Joplin has me riding down some pretty steep rollers and techy DH's I wouldn't consider last season. It also works really well and is pretty solid.
 

·
Living the Dream
Joined
·
1,793 Posts
GD Turbo

I had the original GD and the connection from cable to post broke. Wayne gave me the option of repair or upgrade to turbo for $50. I upgraded and the difference is night and day. I can't imagine another adjustable post working smoother or more reliable than the GD Turbo.
 

·
Registered
Joined
·
232 Posts
Discussion Starter · #10 ·
Thanks for the feedback, when looking through the Turner bike builds it looks like the GD is the more popular of the the two, but it's good to hear that people have had good luck with the AMP also. I was curious if anyone gave the Blacx AM a go??? It seems to kind of have the bling factor going for it and is 27.2.
 

·
Living the Dream
Joined
·
1,793 Posts
I think Fo Hated his

weaver84 said:
Thanks for the feedback, when looking through the Turner bike builds it looks like the GD is the more popular of the the two, but it's good to hear that people have had good luck with the AMP also. I was curious if anyone gave the Blacx AM a go??? It seems to kind of have the bling factor going for it and is 27.2.
You may want to PM him for details.
 

·
Registered
Joined
·
267 Posts
GET THE GD TURBO
I have ridden many posts and it is simple with a spring and cable and works perfectly.
It will never leave you stuck like the hydraulic posts out there.
 

·
Registered
Joined
·
232 Posts
Discussion Starter · #13 ·
Went with the A.M.P. only have a few rides on it, but absolutely love it so far! The cable routing was very clean, through the taco and along the top tube.
 

Attachments

·
Registered
Joined
·
4,448 Posts
I'm also thinking about getting an adjustable post. I've only seen the GD and Joplin in person and the GD boot actually doesn't look as bad as most of the pics make it look. Was wondering though, is there ANY side to side play in the AMP, RASE, or GD? A budy has the Joplin and it has way to much side to side play for my liking.
 

·
err, 27.5+
Joined
·
4,928 Posts
Joplin is bad wrt side-side movement. I think their spec allows for almost an inch of play. GD is much tighter, maybe 1/8in side to side. AMP is about the same, but even a touch better. I can't comment on the RASE, never ridden one in person.

RE: the boot
IMO the GD looks pretty silly without the boot. The inner shaft is only about 3/4", so it just looks pinner. The boot has a lot of advantages in terms of keeping things clean. My GD posts have gone over a year without any maintenance other than a shaft lube. I have yet to hear of another design that is as low maintenance.
 

·
Team Blindspot
Joined
·
2,989 Posts
OldHouseMan said:
I'm also thinking about getting an adjustable post. I've only seen the GD and Joplin in person and the GD boot actually doesn't look as bad as most of the pics make it look. Was wondering though, is there ANY side to side play in the AMP, RASE, or GD? A budy has the Joplin and it has way to much side to side play for my liking.
My AMP developed side to side play. Don't really notice it while riding, but it's there.

My GD is rock solid. No play at all.
 

·
Registered
Joined
·
844 Posts
I'm kind of in the same boat of GD vs. AMP. Both are well reviewed, each have reviews of good customer service, each have a few reviews of side to side movement, and each have reviews of solid performance. Seems hard to go wrong either way.

I'm over the boot look on the GD. It looks silly, but I can get over that. Other major difference seems to be the GD Turbo cable to seatpost mount is straight, while the AMP is 90 degrees down. Not sure if there is any practical difference.

Oh, and I would like to welcome the GD owners to the 21st century (finally reworked their website). I know that is nit picky, but part of me felt funny about buying from site that was soooooo outdated.

Decision time.
 

·
Registered
Joined
·
232 Posts
Discussion Starter · #18 ·
Now that my AMP seems to be breaking in there is some slight play, however it feels solid while ridding and is not even close to what I have seen on the Joplins. Guess some play can be expected from any design considering it is mechanical with moving parts?

What sold me on the post, were the reviews, aesthetics, lack of requiring a butt bump to release the seat and on their website the help videos made it look user friendly.
 

·
Flyin Canine
Joined
·
2,274 Posts
how do you guys get your bike in a work stand once you've got the GD turbo with the bale mounted. I put my bike in the work stand and clamp the seat post all the time.
 

·
Registered
Joined
·
439 Posts
I bought a RASE for the Mega. I needed 27.2 + layback, and AMP don't ship to the UK.

It's OK.

Cable routing and the lever are both neat. Adjustability is obviously good, and I had no reliability issues in a week of pretty brutal riding. On initial use, the way the saddle FIRES up seems pretty terrifying in a bollock crushing kinda way, but actually its fine

The seat clamp is a bag'o'shite. It has limited adjustability (my '02 RFX has a steep s/angle and I couldn't get any saddle to sit level. It's also very bulky - the Ritchey saddle I finally used (had rails parallel to the top, unlike my usual Flite or SLR) had normal sides (as opposed to cutaway like an SLR) and the top half of the clamp fouled on the leather - pushing it out.

It's *very* sensitive to seat QR pressure. Not helped by the now pretty baggy fit on my '02 seat tube. I couldn't do the QR up tight enough to keep the saddle straight, without the release mechanism binding. I got quite adept at straightening the saddle out with my knees...

Both the seat angle and QR pressure issues are noted in the instructions as potential problems, but they don't suggest solutions!

Over the course of the week it developed significantly more play (rotational, plus a bit of rock back and forth). Not as much as my girlfriends Joplin though. Despite using the supplied neoprene sleeve the shaft has also got pretty heavily scored.

Overall, it's almost good. My biggest complaint is the clamp. Redesign that (Raceface XY style would be good), and it would be massively improved. It would also be interesting to try it with a "new" seat tube.

For the moment I've taken it off the bike - most of my riding is big up/big down, so I don't really need the extra weight or complexity. Whether I keep it or not depends on what else appears on the market.
 
1 - 20 of 21 Posts
Top