Trek 4900 alpha

Next, pull the chain through the front derailleur cage and around the bottom bracket don't place it on the small chainring yet. So, always carefully compare the pin you installed to its neighbors making sure they protrude equal amounts. It is possible to use a special connecting link instead of the replacement pin should you decide you'd rather not deal with pressing pins in and out.

You'll just need to get one that's compatible with your chain type and size.

trek 4900 alpha

Tip: If you carry a couple special connecting links in your seat bag you'll be able to repair a broken chain quickly and easily. When a pin is pressed even partially out, this peening is sheered off on the side pressed by the chain tool. To prevent this weakness Shimano and some Campagnolo chains use special replacement pins when the chain is installed new or when one is removed and re-installed.

These replacement pins have pilots that allow installation without damage to the pin or the outer plate. The pilot is then broken off or removed before riding. These pins come with the chains along with instructions for their use. Tip: It's a good idea to carry a spare pin for roadside repairs.

trek 4900 alpha

The pin will protrude out, towards you. Now place the chain tool on the chain so that the link you're working on is seated completely and resting against the back strongest shelf of the tool with the tool's pin aligned to press directly on the special replacement pin when you turn the tool's handle photo, right.

Drive the replacement pin into the chain this will push the pilot part of the pin out the other side. To make sure you don't push the pin too far, stop and check your progress a few times as you turn the tool. To finish installing the pin, break off the pilot, which will snap off if you grab it with pliers and bend.

On some chain tools, you can also slip it into the head of the tool and twist to snap it off photo, left. Now that the chain is joined, check the connection for a tight link. It should pivot at the roller without resistance. If it binds, it may cause skipping and shifting problems. It's comprised of 2 parts, the pin and the pilot. The pin is then pushed outward, away from the spokes until it's fully inserted in the link.

trek 4900 alpha

Campagnolo makes a special tool for installing the speed chain. If you don't have this tool, it's especially important to press down on the chain at the pin to keep it seated i n the chain tool. After the pin is fully inserted, simply pull outward to remove the pilot photo. Check the freshly connected link by flexing it to feel for tightness that may cause shifting problems.

The link should pivot as freely as the others. If not, grasp the chain with your hands straddling the tight link and gently flex laterally to free the link. Type 2: Special connecting link Some chain manufacturers offer a special link sometimes called a "master link"to join the chain.

Because designs vary, be sure to read the directions or ask us. In other words, neither chain end has an outer plate with a pin.

Trek 4500 Review: The Unsung Quality Mid-range Bike?

The special link comes in two pieces photo a. To join the chain install one piece through the inside face of chain and install the second piece through the outside of the other chain end.

Engage the two pieces so that the link pins fit into the special link's plate holes photo b. Then pull the chain to lock the link. The best way to do this is to place the chain on the chainring and pedal hard by hand to lock the special link.Selling my ride. So many memories and miles riding through the city with this bike. In good condition and may need a tune up to get it ready for riding season. Brooklyn pick up. I outgrew this years ago, and has been a commuter bike.

Trek Speed Concept 9. Paid 13, 2 years ago. Trained for 3 Ironman events. Injury spine precludes anymore Tris. Must sell. My loss your gain. Have you ever had that spring itch to ride a bike? Maybe you set a New Years resolution to ride a bike to work every day. What ever the reason you are looking for a bike, this is the bike for you! Smooth shifting and braking.

Comes with Cateye Velo 7 computer and Greenfield kick stand. This bike has very low hours. It's in great condition and runs great. Perfect for commuting, cruising and any trail you're brave enough to go down. Trek Alpha Aluminum " Tires Trip computer included - needs batteries Three ring Front sprocket 9 speed rear sprocket It's in great condition but I can only ride one at a time!

Here is a Trek Mountain bike in 18". I try and find the bad scratches, and take pictures of them. There are the normal scratches from the cables on the top tube, a couple small scratches on the non-driveside drop out, from leaning the bike, and a couple small scuffs on the downtube, near the head tube. These are all s. Trek Alpha Aluminium. Size 18 with BB. Made in USA. Good Condition. Frame size is 21".Register Login.

Years Made. Compare Review. Very Good. The bicycle looks new and is in like-new mechanical condition. No service is required on any component, part, or accessory. The bicycle may require minimal service adjustments without the need of replacing any parts. The frame or fork or components or accessories have cosmetic blemishes. The frame if metal may have minor, aesthetic dings. Bicycle is free of major mechanical issues but may require some service, a tune up is recommended.

Some parts may require replacing, not to include front or rear shocks, wheels, shifters, front or rear derailleurs, braking systems, crank set or chainrings. Braking surfaces may have minor grooves or discoloration. Suspension and brakes may need to be serviced. The frame if metal has minor, aesthetic dings. The bicycle has some mechanical issues and a tune up is necessary.

An overhaul is recommended. Multiple parts need to be replaced. Suspension and brakes need to be serviced. The frame or fork or components or accessories have many cosmetic blemishes. The frame if metal has numerous aesthetic dings.

The bicycle has mechanical issues and a tune up is necessary.Does Trek 4 Series sound familiar to you? It might just as well, because you may have already read our Trek review. So, who is actually Trek ? A better equipped version of the same series, and a doorway to the mid-level segment, or at least, a bike daring to attack it? There are no significant differences between the and frames except for decals. In fact, same as for his younger sibling, the agility of Trek is diminished by the position of the highly placed handlebar.

However, for the other side of story, those who appreciate a more comfortable position will be quite pleased with this position. If you want a sportier ride you just have to remove one or both spacers placed on the steerer tube and place them above the stem.

Thus, you will immediately turn to a more aggressive position on the bike.

trek 4900 alpha

So, this bike really has some racing pedigree! As I said above, the is an upgrade to the model in terms of specs. Drive train is composed of a Shimano SLX rear derailleur with Shadow technology the cage works inside the plane represented by chainstay and droputs which is capable, quiet and fast, paired with a Shimano Deore front derailleur. This is also a midrange product of the Japanese brand but it requires some extra-effort when shifting from smaller to bigger chainring.

Overall, 3 chainrings and 10 sprockets are ready to be used and abused as you prefer. Shimano M brakes are also an upgrade from the Hayes Dyno found on the Trek Both wheels are equipped with Center Lock rotors and should you need extra-braking power you are free to choose a mm c. The fork comes from SR Suntour and represents a pleasant surprise on this bike.

Some models, like the XCR found on this Trekare made in Taiwan, not in China, and this explains the huge quality difference between the two forks. Suntour XCR offers mm of travel and a surprisingly efficient damping for a fork coming from Taiwan. Also, it manages to do this without any strange knocks on the rebound! It is also equipped with Lock-Out function, with handlebar control, however its weight does not impress. Hanging in our scale, it showed a value of 2.

Overall, an acceptable fork for this Trek, and the rider only can decide to change it for a lighter one or keep it thanks to its decent performance. The fast rolling tires, which actually provide poor grip, together with Shimano cup and cones hubs contribute to this increased weight. Also, acceleration is not impressive at all.

Notify me of followup comments via e-mail. You can also subscribe without commenting. Bicycle reviews and components reviews — Bike-advisor.Last Updated on 6 months ago. Even though the most expensive bikes are the ones that attract the most attention of enthusiasts, it is usually the mid-range to low-range bikes that bring the more money to a company. And this is the case with the Trek — a mid-range bicycle which everyone loves. The Trek is merely an all-rounder, a bike that will please almost every biker without problems.

It offers everything everyone wants — the perfect comfy design, high-quality hardware, reliability, and top-notch performance both in trails and on the road.

However, the bike is not perfect. Even though it is one of the most sought for bikes for its mid-range cost — it is still not the best. But overall, it is a bike worthy of analysis. Any experienced biker who has tried the Trek knows that maybe the trickiest part of the bike was the V-brakes. However, sinceTrek started to make the model slightly different — and the change was, of course, mainly on the brakes.

Sincethe company started using Shimano Hydraulic Discs brakes instead of the V-brakes from before. Especially in wet roads, the Trek was usually unreliable. With the change, however, all this changed. The improved brakes made the Trek one of the best bikes out there, fixing may be the only problem the most serious fans could mention about the bike.

Especially if you were a beginner in mountaineering, you would feel like this size was just perfect. Getting a Trek and being inexperienced was seemingly the best formula to enjoy a fun time at beginner-level mountaineering. Being smaller in size improved the overall handling and agility the bike had on the road. During the hardest of paths, even, the small size of the wheels alongside the tires made it incredibly reliable nonetheless. When you look at the components of the Trekyou could see how well-made a mid-range bike could be.

Actually, the components the Trek uses are the ones other more expensive bikes also use. Taking an in-depth look at the derailleurs, for example, we find some Shimano decent parts.Ten years ago when I started cycling the first bike I bought was a Trekan entry-level mountain bike. This past winter the local bike shop custom-built one bike for me and entirely rebuilt two of my other bikes. After spending so much time in the bike shop I finally decided I would try to rebuild the Trek myself.

With the help of the guys at the bike shop I bought all new parts for the rebuild. The only items that did not need replacing were the wheels. I have two sets of wheels for this bike anyway—one with snow tires and the other with aggressive knobby tires. Since the Trek was an entry-level bike it came with fairly inexpensive parts, but the aluminum frame has a lifetime warranty. When I did the rebuild I decided to move a few levels up the Shimano product line for most of the parts so I would end up with a better bike than I had to begin with.

Before you can start rebuilding a bike you have to remove all the old parts first. Since this bike had suffered through ten Chicago winters it is not surprising that all the parts were highly corroded. When I took the old parts off the bike I kept the cable housings so I could cut new housings to the same size.

The hardest thing to get off the bike was the city sticker—the town I live in requires all bikes to have a sticker to help the police find the owner in case of theft. I am not sure what the sticker was made of, but it took me over an hour to get it off the bike! Once all the old parts were off I used Turtle Wax Premium Grade Rubbing Compound on the frame to remove scratches in the paint and Brasso metal polish to clean the chrome.

One item that I was not able to get off the bike was the bottom bracket—ten years of road salt made it very difficult to remove, so I had the guys at the bike shop replace it for me. The bike shop has a bottom bracket tool that can apply a lot more leverage than I was able to apply. They put on a maintenance free Shimano BB-UN55 Bottom Bracket with sealed bearings and a high quality spindle that should last for many years.

This crankset came with a chain guard and is much lighter than the set I had on before. The next items installed were a pair of Shimano Acera V-Brakes —the mud guard on these brakes was another nice improvement from the original brake set. There were three other items I added that were not absolutely necessary, but I thought were nice finishing touches. The last item was a Lizard Skins Jumbo Chainstay Guard —a neoprene cover that fits over the chainstay to keep the paint from chipping and stop the noise caused by chain slaps.

Trek after the rebuild on the shores of Lake Michigan. Like most cyclists I enjoy riding and believe that bike repair is best done by trained professionals. One of the reasons I wanted to do this rebuild myself was for my education. Rebuilding a bike will teach you a lot about basic bicycle mechanics and once you do it you will feel a lot more confident about making a roadside repair when your bike breaks down 40 miles away from home.

I purchased all the parts for this rebuild from the local bike shop. I could have saved a few dollars by buying the parts online, but the local bike shop was very helpful in making sure I had the right parts. If you are one of those people who finds the parts you want at a local store and then buys them online to save money, well, I think you are lower than pond scum.

Tags: bicyclebikecyclingmtbrepairshimanotrek. All Seasons Cyclist.

Trek 4900 Mountain Bike Review

I am already wanting do rebuild another bike, but all of mine are now in perfect condition. Maybe I need to go to the bike auction our local Police Dept. Me Too! Great job! Now you are an expert.This is a sturdy, inexpensive mountain bike that should be good for several years of riding. The components are nothing special, just servicable. It should be great for casual trail riding. If you get into racing or taking long rides, you'll probably want to upgrade.

You don't mention what condition it is in, how it has been serviced or how many folks have owned it. It depends on what you are looking for. It is considered a higher-end entry level mountain bike. It probably retailed new around dollars. I'm guessing the bike is at least years old, so I would only pay dollars depending on condition.

This bike will handle pretty much any trail you go on. It is a very sturdy and solid bike. The only negative thing that I noticed was that the fork was very stiff. I'm a fairly heavy rider lbs and still rarely got full travel out of the fork. Not the smoothest of rides.

All in all though, a good entry-level bike. If used, I would suggest having the bike looked over by a bike shop to see how much money would be required for general maintenance. If you need a new chain, cassette, chain rings, cables, brakes, etc. Dan O. Update: Is this good bike? Answer Save. There are a number of reviews on Mountain Bike Review. Hope this helps you out. Source s : I owned a '03 for several years before upgrading. This Site Might Help You. RE: trek alpha Is this good bike?

Erika Lv 4. Still have questions? Get your answers by asking now.

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