Koja veličina bicikla mi treba?

Uputstvo za izbor veličine rama, točkova i drugih delova bicikla

Koja veličina bicikla mi treba?

 

U zavisnosti od uslova vožnje ćete birati tip bickla, što će na kraju diktirati i raspoložive veličine rama i ostalih delova bicikla.

 

Veličina rama

Zavisi ne toliko od vaše visine koliko od dužine vaših nogu. Ako birate standardni ram u obliku dijamanta ili romboida treba da izmerite unutrašnju meru - dužinu vaših nogu od zemlje do međunožja. Treba vam ram čija će gornja šipka da bude niže od vašeg međunožja tako da možete stati ili osloniti se na noge ravnim stoplom a da vam ram uopšte ne smeta.

Za trkačke ili hibridne bicikle, razmak između vašeg međunožja i gornje cevi rama treba da je 2 do 5 cm.

Kod planinskih bicikala ovaj razmak treba da bude oko 10 cm, posebno ako vozite bicikl po neravnim terenima, gde se može desiti da spadnete sa sedišta. 

BMX i freestyle bicikli imaju točkove veličine 20" tako da ovde veličinu rama i točkova praktično i ne možete birati. Elemente bicikla - šticnu, sedište, korman ćete birati prema svojoj visini i konstituciji tela. 

Veličina ramova je najčešće izražena u inčima. Obično predstavlja dužinu šipke-cevi rama od pedala odnosno srednje osovine do kraja cevi u koju se ubacuje šticna sedišta.

Dohvat je bitan i predstavlja udaljenost sedišta od volana. Po pravilu, kad sednete na bickl i stavite ruke na volan, od volana ne bi trebalo da vidite predju osovinu točka. Dohvat treba da je takav da uvek možete voziti bickl sa blago savijenim raukama u laktovima. Duge vožnje sa ispravljenim rukama dovode do bola u laktovima, leđima i ramenima. Ako su vam ipak laktovi u grudnom košu, dohvat je premali. Dohvat se obično može regulisati podešavanjem ili zamenom lule volana.

 

Visina [cm] Unutrašnja dužina noge [cm] Veličina rama [inč] Veličina rama [cm]
157 71 15 38
162 74 16 41
167 74  17 43 
172 76 18 46 
175 76 19 48 
177 79 20 51
182 84 20 51 
187 86 21 53
192 89 22 56 



Veličina točka, felne i gume bicikla

Felne bicikla se prave u raznim veličinama. Većina trkačkih i hibridnih bicikala imaju točkove (felne) veličine 27 inča ili 700C. planinski bicikli obično imaju felne veličine 26 inča. BMX bicikli imaju veličinu felne od 20 inča.

Širina felne zavisi od namene bicikla. Trkački i hibridni bicikli imaju uže felne radi veće brzine, manje trenja. Široke felne planinskim biciklima omogućavaju bolji kontakt sa podlogom / terenom i bolju kontrolu bicikla po neravnim terenima.



 

Youth Bicycle Sizing Chart

Since children grow quickly, kids bikes are designed to accommodate many sizes. The rims of the bike tires serve as a good measurement of proper bicycle size.Wheel Size 10" and 12" 16" 20"
Age 1.5 - 5 years 4 - 8 years 6 - 12 years
Height 26" - 38" 34" - 48" 48" - 60"


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Adult Bicycle Sizing Chart

Adult bicycles can also be generally sized by tire rim size. Many different styles of bicycles are available for Teens and Adults, including BMX, Comfort, and MountainWheel Size 20" 24" 26"
Frame Type BMX/Freestyle Mountain and Comfort Mountain and Comfort
Age Teen and Adult Teen Adult
Height 52" and up 52" - 60" 62" and up


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Adult Bicycle Frame Sizing Chart

Many manufacturers offer bicyles in several frame sizes for a personalized fit. Straddling the bicycle standing flat footed on floor, you should have a minimum of 1-3" clearance between your inseam and the top tube of the bicycle frame. Due to varying body types, the chart below should be used as a guideline only for frame sizing.Height 66" - 70" 70" - 73" 72" and up
Frame Size 16" - 17.5" 18" - 19.5" 20" - 22"
Small Medium Large

 

 

Choosing the proper tires

Tires greatly influence a bike's riding characteristics, since they directly affect traction, steering and braking. There are two basic types of tires clincher and tubular.
Clincher
Refers to a conventional bike tire with a separate inner tube
When inflated, the tire clinches the rim as its inner edges, called the bead, become captured against the rim walls
Most road and all mountain, BMX and freestyle tires are clincher
Tubular (or sew-up)
Refer to a tube that is sewn into the tire, and then the tire is glued onto a special edgeless rim
These are only used for high-end road racing bikes

Tires for road and hybrid bikes
High-performance tires
High-performance tires are lightweight, narrow and can be inflated to high pressures (90 to 100 pounds or more)
They usually have a dual tread consisting of a firm center for low rolling resistance, flanked by a softer compound for good traction in turns
Recreational tires
Recreational tires are designed for durability and comfort
They're heavier than performance tires, but usually last longer
Mountain bikes
Knobby treads
Knobby treads are aggressive, designed to dig into loose soil. They are usually designed specifically for front and back wheels.
Widely spaced
Widely spaced knobs are best in wet terrain because they limit mud accumulation
Tightly spaced
Tightly spaced knobs are better in drier conditions. Neither is ideal for riding on pavement.
Semi-slick or bald tires
Semi-slick or bald tires have knobs on both edges for gripping in turns, but the center section has very little tread to allow for faster straight-on riding. They are good on dry, packed dirt trails and roads.
Hybrid treads
Hybrid treads are cut into the tire rather than protruding like knobs. They are good for pavement, dirt roads and hard-packed trails.
Slick tires
Slick tires have no tread, and are designed to be ridden only on pavement
Kevlar tires
If you will be riding on city streets or in places where you may encounter debris, consider investing in kevlar tires
They are a bit more expensive than traditional tires, but could save you money and aggravation in the long run if you suffer from frequent flats and punctures

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Bike components

Derailleurs
Derailleurs are the mechanisms that lead the chain from one sprocket to another while the chain is moving forward
They are the components (one in front and one in back) that allow you to shift gears
BMX and freestyle bikes do not have multiple gears, and so will not have derailleurs

Handlebars
Handlebars help steer the bike, and are the place where brake levers and shifters are mounted
Most road bikes have drop style or racing handlebars that encourage an aerodynamic riding position
Mountain and hybrid bikes have upright or straight handlebars that encourage a more upright riding position for comfort and control

Saddles
A comfortable saddle is key to enjoying your bike
Saddles are available in a wide variety of styles, and are easy to switch
Some padding is good, but more is not always better. Excess padding can add pressure and discomfort
Padding usually consists of gel or foam
Some saddles have cut-out sections, gel-padded areas, or holes cut through the top that are designed to combat male numbness and other anatomical concerns
If you are female, consider a women's saddle. These models are wider in back to better accommodate women's generally wider pelvic structure, and they have a shorter nose to better suit female anatomy.

Brakes
A braking system is actually comprised of a few different components:
Brake levers are located on the handlebars and are used by the rider to slow or stop the bike
Brake calipers squeeze against the rims to control the bike's speed
V-Brakes are a type of caliper brake in which the brake arms reach around the side of the wheel to press brake pads against the wheel rim. They are used primarily on mountain and BMX bikes.
Side-pull brakes have both cable arms on the same side of the caliper. They are best suited to road and recreational bikes.
Brake pads are blocks of rubber-like material that press against the wheel rim when the brakes are applied

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