They are in the plumbing section of a good hardware store. rotate the pin in both directions while doing so to distribute the grease evenly. Push the pivot pin in place and pump grease into the zirq until oozes out. This enables you to simply grease the bearings once in awhile (No disassembly) and has the added benefit of holding the bushing in place. You can get a zirq fitting online or at a good hardware store. Drill and tap a hole for a zirq fitting exactly as shown in the picture once the bushing is pressed. Once pressed in place so that the bushing and the bearings are perfectly centered. Again, you can have the shop do this or attempt it yourself. Once the machining is done, the bushing and bearings are pressed. 020" of the O-ring protruding from the bushing which will seal the entire system nicely when the carrier is installed. The bushing needs to have a slight counterbore turned into it on either side that is. This is something they can measure at the shop. 020" clearance when the carrier is compressed by tightening the pin and nut with moderate torque. Bring the pin and pin nut, and tools with you so they can get it just right. The machinist should be able to figure out the correct displacement. I found that 1.95" worked for me, but manufacturing differences may mean it's different in your case. Meaning, it can't be too wide or it will bind. Critical: the bushing width needs to take into account the deflection of the bottom bracket carrier when tightened. Ask them to fit the bearings into the swing arm by milling it out and creating the bushing. Bring the fully disassembled swing arm, the bearings, and the bottom bracket carrier with you. Any competent machine shop can do this for you. The next step is to fit the new bearings into the swing arm housing which requires a milling operation and the creation of a bushing. These can be bought on Amazon: Koyo B-1816 Needle Roller Bearing, Full Complement Drawn Cup, Open, Inch, 1-1/8" ID, 1-3/8" OD, 1" Width. We will start by replacing the floating roller bearing design with two encased needle bearings that fit perfectly, fully supporting the pivot pin. To repair the problem permanently requires a redesign. It carriers the brunt of the pedaling forces. Typically, the problem pivot (there are two) is the one closest to the bottom bracket. Of course, once the swing arm aluminum is worn it will never be right again. It's just too weak of a design to last under even normal use. A heavy or aggressive rider will wear it out very quickly allowing a slight movement during pedaling which translates into a pronounced creak or click that can be felt in the pedals. It works well until the steel of the bearing wears the aluminum on both sides. They use an off-the-shelf 1-1/8" roller bearing from a headset that is suspended between an aluminum split cone washer and the beveled interior shoulder of the swing arm housing. However, its fatal flaw is the eventual wear of the aluminum to steel connections in their floating bearing design. Bike will come with the original platform pedals installed.The parallelogram design of GT's complex iDrive 4 rear suspension pivot is clever and effective at stopping pedal bob, especially while climbing in the saddle. *The clip-in style pedals pictured are not included. Shimano hubs with quick release both wheels Nearly new front wheel - Sunrims Rhyno Lite Tektro Auriga Comp hydraulic brakes (disc rotors) I-DRIVE rear suspension geometry with Fox Racing rear air shockĮpicon SR Suntour front fork shock with Speed Lock/Lockoutģx9 gears (27 speed) to climb any terrain Things the bike could eventually use: tuned brakes / hydraulic fluid (mineral oil), and new front fork seals.įeel free to email or text 9one9-3two3-1zero25Ħ061 aluminum frame, flat black factory paint A well-known bike shop in town appraised the bike in it's current condition at $500. I am the original owner of the bike and have all of the original paperwork and owner's manuals that came with the bike- even the original $1,240 receipt. The bike is a solid daily rider as is, and had a full 'Pro Tune' 1 year ago. It has good components and a great drive-train. This bike has been great to me and it handles the most intense trails in the area no problems- and it looks great! I am 6'0 tall and this bike should fit anyone 5'10 - 6'2, I would guess.
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