How to know if you can add suspension to old frame?
#1
How to know if you can add suspension to old frame?
Hi there,
I have an old Raleigh Ogre Max and I'm wondering if it's possible to switch out the forks and give it front suspension? How do I go about figuring this out? I can't find much on Google.
The bike:
I have an old Raleigh Ogre Max and I'm wondering if it's possible to switch out the forks and give it front suspension? How do I go about figuring this out? I can't find much on Google.
The bike:
#2
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First confirm what size headset/steer tube that frame has. It'll either be 1" or 1 1/8". If it's 1" it will be more difficult to find a suspension fork. You have a threaded headset now; most forks will have a threadless steerer so you'll need a new threadless headset, or find a threaded fork.
If it were me, I'd make sure I know what headset the frame takes, look for a fork that fits, and replace the headset with a threadless headset. Other obvious things: make sure steer tube is long enough for the frame, make sure new fork has canti bosses (and figure out some sort of hanger, if not switching to v-brakes).
If it were me, I'd make sure I know what headset the frame takes, look for a fork that fits, and replace the headset with a threadless headset. Other obvious things: make sure steer tube is long enough for the frame, make sure new fork has canti bosses (and figure out some sort of hanger, if not switching to v-brakes).
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#3
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The subject bike looks like it has a 1" threaded steerer. It will definitely be difficult to find a suspension fork with a 1" steerer. In addition to the other good advice from tFUnK above, also know that a suspension fork will raise the head tube area of the bike up by a few inches. In the world of ergonomics and geometry, even just a few centimeters can make a big difference, and a suspension fork would be a pretty large change to the bike. The head tube angle will slacken, and you'll want to find a suspension fork that has an offset that will more or less maintain the current front wheel trail so bike handling isn't changed too much. This will also raise the top tube (watch standover clearance!) and will raise the bottom bracket area as well.
I'd personally recommend against it...and instead look for a used bike that has a suspension fork from the factory. Back in the day, when mountain bikes were first transitioning from fully rigid to having a front suspension fork, the frame geometries were often revised and both "versions" sold along side each other. Take the Trek 800 series as an example. You could buy an 830 or an 830 SHX (which had the front suspension fork). The geometry of the diamond of the frame was different between the two bikes to account for the front fork on the SHX.
I'd personally recommend against it...and instead look for a used bike that has a suspension fork from the factory. Back in the day, when mountain bikes were first transitioning from fully rigid to having a front suspension fork, the frame geometries were often revised and both "versions" sold along side each other. Take the Trek 800 series as an example. You could buy an 830 or an 830 SHX (which had the front suspension fork). The geometry of the diamond of the frame was different between the two bikes to account for the front fork on the SHX.
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#4
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Just noting that if the saddle height is correct for the current owner the bike is probably much too big. A suspension fork will make things worse
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#5
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As others have said, your only option is if the steerer is 1-1/8”. If it is, then you can convert your front brakes to disc and run an inexpensive SR Suntour or maybe a Rockshox.
I still ride a 26er with a 1” steerer and a Marzocchi Bomber fork. I also have a Trek 970.
Don’t worry about geometry, the shortest travel you get is an 80mm fork, and that might be tough to find these days.
John
I still ride a 26er with a 1” steerer and a Marzocchi Bomber fork. I also have a Trek 970.
Don’t worry about geometry, the shortest travel you get is an 80mm fork, and that might be tough to find these days.
John
Last edited by 70sSanO; 07-31-22 at 10:49 PM.
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I wouldn't invest money into that bike, fit is part of it but the parts on it are not anything great and not worth much unless maybe sentimental value but that can only go so far. Find a bike that fits you and fits your wants and needs and don't worry about the old bike.
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Suspensions are energy sapping and add weight. I advise against them in general unless you actually do the type of riding that would benefit.
If you want a bit softer ride, consider larger tires at a lower pressure.
If you want a bit softer ride, consider larger tires at a lower pressure.
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If you want a bit softer ride, consider larger tires at a lower pressure.
(Although, TBH, you’ve probably got your tire pressure too high; 40 psi should be plenty on the road, 25-30 for trails, depending on rider weight)
bikethis I'd hold off on sinking a whole bunch of money into that particular bike; what you’ve got is an upright/cruiser dressed as an MTB.
there are still some 1” threaded suspension forks that could fit that bike, they are among the cheapest versions you can find (so they’re heavy and don’t work very well)
Suspension forks are also taller than your existing fork, and that already looks like a pretty large frame so it might get awkward to ride.
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Getting a Schwalbe 2.35" Big Apple tires. The largest that will fit, meaning a 2.15 or 2.35" for the front. Used to have them on my Kona Humu and they were great.
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#10
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Please explain how a suspension fork is 'energy sapping'. Yes, they add weight, no...they do not 'sap energy'. On the OP's bike it will definitely screw up the front end geometry. Any fork that will fit that bike and be remotely close to the geometry needed will be utter and complete garbage.
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Shorten the stems a bit and wider bars and they are great, (at least for what they are), with a little more slack. I can’t even imagine riding any mtb with a 72* head angle.
John
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Proper fit and appropriate tires with appropriate pressure is much more important.
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The OP’s bike, with the extra long chain stays, tall head tube and upright stem, is definitely one of the latter.
‘90s XC racing was also less technical than today, and favored bikes that were good climbers and fast on the flats, that’s why you see that aggressive geometry on NORBA era bikes
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OK... Ya gotta find a 1" to 1 1/8" Suspension Fork. Then graft it in for your use. Sure there are going ta be problems but if ya got the money and Didily Gizmology it can be done... fun, Fun, FUN
Come On Guys... We can do Anything!!!
Lately I get just as much enjoyment from tinkering around on my bikes as ridding them... Ha
Come On Guys... We can do Anything!!!
Lately I get just as much enjoyment from tinkering around on my bikes as ridding them... Ha
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OK... Ya gotta find a 1" to 1 1/8" Suspension Fork. Then graft it in for your use. Sure there are going ta be problems but if ya got the money and Didily Gizmology it can be done... fun, Fun, FUN
Come On Guys... We can do Anything!!!
Lately I get just as much enjoyment from tinkering around on my bikes as ridding them... Ha
Come On Guys... We can do Anything!!!
Lately I get just as much enjoyment from tinkering around on my bikes as ridding them... Ha
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I ignorantly pursued this with my Rockhopper from 1997. IRRC they used the same frame for both suspension and rigid.
I found a M-Bomber with 100mm travel that was air suspension. Adjusting the pressure makes up for the difference. It was tricky but I found the sweet spot after putting my weight on the bike.
When I finished this up with the disk in 2011/12, I was up to about $200 for the fork and all the changes which included AVID brake levers, disk caliper, and front wheel (needed the hub for disk).
Love the disk performance and you don't need one in back.
PA160495w , on Flickr
RockHopper_ Sprung_2012_018 on Flickr
It added a pound to the weight and did not impact commute times. I set it up so only 15min is needed to swap. The key is using a head set that has spare parts available such as an extra crown race for the second fork.
I found a M-Bomber with 100mm travel that was air suspension. Adjusting the pressure makes up for the difference. It was tricky but I found the sweet spot after putting my weight on the bike.
When I finished this up with the disk in 2011/12, I was up to about $200 for the fork and all the changes which included AVID brake levers, disk caliper, and front wheel (needed the hub for disk).
Love the disk performance and you don't need one in back.
PA160495w , on Flickr
RockHopper_ Sprung_2012_018 on Flickr
It added a pound to the weight and did not impact commute times. I set it up so only 15min is needed to swap. The key is using a head set that has spare parts available such as an extra crown race for the second fork.
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Last edited by SJX426; 08-03-22 at 01:59 PM.
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I'd suggest a suspension seatpost (eg, "ThudBuster"), except it looks like there's no room for one as noted by alcjphil! (Look into proper leg extension.)