Lentil

https://www.bikepedia.com/quickbike/BikeSpecs.aspx?year=2008&brand=Giant&model=Boulder+SE
Got this recently for winter cycling.
Would 26x2.4 fit my bike?
If not, anyone know max size recommendation for my bike?
Maxxis Holy Roller 26 x 2.4 Wire Tire - Mountain Equipment Co-op. Free Shipping Available

umazuki

I'd say it's likely they'd fit. Mountain bikes tend to have generous tire clearance, but the only way you'd know for sure is to put them on. A ruler won't even help - companies sell tires as 2.4" wide but may actually be 2.3" or 2.5". To complicate things even further, the rim width can affect the width of the tire.

Retro Grouch 

I'd say it's extremely unlikely that they'll fit - but they might.

What size tires does your bicycle have on it now? Check out places like between the chainstays near the bottom bracket for clearance. Don't forget to check front derailleur clearance after shifting into the granny chainring.

What kind of brakes does your bike have? I'm guessing it has linear pull calipers. Will they open widely enough to clear such a fat tire?

Lentil

[TABLE="class: DetailsView"]
[TR="class: FieldHeaderTitle"]
[TD="colspan: 2"]From BikePedia

Frame & Fork[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Frame Construction[/TD]
[TD]TIG-welded[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Frame Tubing Material[/TD]
[TD]ALUXX aluminum[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Fork Brand & Model[/TD]
[TD]SR Suntour XCM, 100mm travel[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Fork Material[/TD]
[TD]Steel/aluminum, single crown[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Rear Shock[/TD]
[TD]Not applicable[/TD]
[/TR]
[/TABLE]



[TABLE="class: DetailsView"]
[TR="class: FieldHeaderTitle"]
[TD="colspan: 2"]Components[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Component Group[/TD]
[TD]Mountain Mix[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Brakeset[/TD]
[TD]Alloy Direct-Pull brakes, Shimano EF-50 levers[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Shift Levers[/TD]
[TD]Shimano EF-50[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Front Derailleur[/TD]
[TD]Shimano C-102[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Rear Derailleur[/TD]
[TD]Shimano Alivio[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Crankset[/TD]
[TD]SR Suntour SCT V2, 28/38/48 teeth[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Pedals[/TD]
[TD]Nylon[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Bottom Bracket[/TD]
[TD]Cartridge[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]BB Shell Width[/TD]
[TD]Unspecified[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Rear Cogs[/TD]
[TD]7-speed, 13 - 34 teeth[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Chain[/TD]
[TD]KMC Z51[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Seatpost[/TD]
[TD]Alloy, 30.9mm diameter[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Saddle[/TD]
[TD]Unity Groove Plus[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Handlebar[/TD]
[TD]Steel riser[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Handlebar Extensions[/TD]
[TD]Not included[/TD]
[/TR]
[TR="class: AlternatingRow"]
[TD="class: FieldHeader"]Handlebar Stem[/TD]
[TD]Alloy[/TD]
[/TR]
[TR="class: row"]
[TD="class: FieldHeader"]Headset[/TD]
[TD]1 1/8" threadless[/TD]
[/TR]
[/TABLE]



The tires it has now are Kenda 26x2.125

dynaryder

I doubt it. My old 1x1 came with 2.35" tires with minimal knobs and there was maybe a mm or two of clearance under the brake cable. Most fat-tired bikes run disc brakes for this reason.

2.1" is plenty wide for snow as long as the tread doesn't pack up. My winter studded tires are 2" and work fine.

fietsbob

Measure the clearance space between the frame and fork tubes, Where the Tires are , And Report the Measurements.

Wilfred Laurier

If you are riding on the road in the winter then wide tires like that are probably not the best choice. Narrow tires have better ability to cut down to the hard surface underneath and get traction. IF you are trail riding then this does not apply. If you are riding on ice then the width of the tires hardly matters - you need studs (at least on the front) or you will fall.

Also, there is a winter cycling subforum here where lots of experienced winter cyclists post.