Moto Guzzi V50 I, II, III, Monza

(updated September 99)

Rim Stock Size Possible Alternate
Front 1.85 x 18 90/90S-18 100/90-18
Rear 2.15 x 18 100/90S-18 110/90-18

Manufacturers' Recommendations

Manufacturer Front size Rear size
Avon
(no data)
Bridgestone BT35 90/90H-18 BT35 110/80H-18
BT45 90/90H-18 BT45 110/80H-18
Dunlop
(no data)
Metzeler (U.S.A)
(no data)
Metzeler (Germany) ME-11 3.60H-18 ME-77 4.10S-18
ME-11 3.60H-18 ME-22 4.10S-18
ME-22 3.00S-18 ME-77 3.50S-18
ME-22 3.00S-18 ME-22 3.50S-18
ME-11 3.25S-18 ME-77 3.50S-18
ME-11 3.25S-18 ME-22 3.50S-18
ME-77 3.00S-18 ME-77 3.50S-18
ME-77 3.00S-18 ME-22 3.50S-18
Michelin Macadam 50 100/90V18 Macadam 50 120/90V18
Pirelli (U.S.A)
(no data)
Pirelli (Germany) MT 65 3.00S-18 MT 65 3.50S-18
MT 65 3.25S-18 MT 65 3.50S-18

Martyn's Opinion

General Comments

The light versatile V50 models originally came on very narrow tyres.  The combination of tyre width and rim diameter leaves just one set still available in the stock size.  Fortunately, the rims are wide enough to go up one size on each end without squeezing the tyre -- by going up to 100/90 on the front and 110/90 on the rear, the balance of the bike is not affected, and the availability of choices improves drastically.  Going with the wider tyres will make the handling a little less quick, but add a little stability.  These days, with grooved pavement and eternal road construction, the extra stability comes in handy, while the bike flicks over so easily that the loss in handling is not that significant.  Most of my choices below go for the larger tyres.

The Safe Bet, General Purpose

Brand Model Size MAW
Front Avon Roadrunner AM20 90/90H-18 $96
Rear Avon Roadrunner AM21 100/90H-18 $98

The Safe Bet would have to be the only matched pair which is available in the stock size.  While the bike is tolerant of going up a width on each end (and in fact all my other selections do so), the conservative Safe Bet to stick with the stock size.

As for general purpose use, the Avon Roadrunner is a very good tyre for lightweight bikes, and the V50 should be no exception.  One big benefit is the excellent straight-line highway stability of the AM20 front, which on a bike with narrow tyres is much appreciated.  It also has good wet and dry traction, and a profile which contributes to very good handling.

A Tight Budget

Brand Model Size MAW
Front Dunlop K491 Elite II Touring 100/90H-18 $62
Rear Kenda K657 Sport Challenger 110/90H-18 $50

While the Kenda performs well on the rear of a motorcycle, and it's undoubtedly the best value for money (so little money!), there are some concerns about using it on the front.  I prefer something with a bit more traction on the front, particularly in the wet, and while the Kenda sticks well enough it doesn't quite have enough stick to make me comfortable with putting it on the front.  Also, there is a tendency to accentuate weaving.  So I'd match the Kenda rear with another front, of which the Dunlop 491 is a good and inexpensive example.

Touring

Brand Model Size MAW
Front Dunlop K491 Elite II Touring 100/90H-18 $62
Rear Dunlop K491 Elite II Touring 110/90HB18 $69

While the Avon Roadrunners would be a good touring tyre too -- with superb straightline stability -- for high-mileage riding you just can't beat the Dunlop 491.  The combination of good wet and dry traction, with excellent load-handling and tread life, makes it a clear choice for the touring rider.  In particular, the low price of these Dunlops seals the choice.

Sport-Touring

Sport-Touring Brand Model Size MAW
Front Bridgestone BT45 Sports Mileage 100/90H-18 $72
Rear Bridgestone BT45 Sports Mileage 110/90H-18 $73

This one's a hard choice.  The Roadrunners don't have quite enough stick for sport-riding, and the Super Venoms don't last long enough for touring.  The best compromise, then, is one of Bridgestone's Dual Tread Compound technology tyres, of which the BT45 is the best and most recent -- it's turning out to be an excellent tyre indeed.

Sport-Riding

Sport-Riding Brand Model Size MAW
Front Avon Super Venom AM20 100/90V-18 $102
Rear Avon Super Venom AM18 110/90V-18 $107

No question.  These are the best sport tyres available for older bias-ply machines, and they'll bring out the best in the light Goose's handling.

Martyn's Choice

Brand Model Size MAW
Front Avon Roadrunner AM20 90/90H-18 $96
Rear Avon Roadrunner AM21 100/90H-18 $98

No matter which model of V50 we're talking about, I'd go for the Roadrunners.  The Super Venoms just don't last long enough to make it worth fitting except for primarily sport-riding, and the Roadrunners handle well along with their good general purpose qualities.


The Full List

(from MAW and manufacturer web pages)

Well-sized matched pairs

Brand Front size MAW match Rear size MAW match
Avon Roadrunner AM20 90/90H-18 
100/90H-18
$96 
$97
exact 
excel
Roadrunner AM21 100/90H-18 
110/90H-18
$98 
$114
exact 
excel
Super Venom AM20 100/90V-18 $102 excel Super Venom AM18 110/90V-18 $107 excel
Bridgestone BT35 Sports Mileage 90/90H-18 
100/90H-18
 - 
$93
exact 
excel
BT35 Sports Mileage 110/90H-18 $106 excel
BT45 Sports Mileage 90/90H-18 
100/90H-18
100/90V-18
$70
$72
$68
exact 
excel
BT45 Sports Mileage 110/90H-18 $73 excel
SE11 100/90H-18 $74 excel SE11 110/90H-18 $80 excel
Dunlop F11 100/90H-18 $71 excel K627 110/90H-18 $74 excel
K491 Elite II Touring 100/90H-18 $62 excel K491 Elite II Touring 110/90HB18 $69 excel
K591 Sport Touring 100/90V-18 $65 excel K591 Sport Touring 110/90V-18 $63 excel
IRC Durotour RS-310 90/90H-18 
100/90H-18
$49 
$48
exact 
excel
Durotour RS-310 110/90H-18 $50 excel
Road Winner RW-010 90/90HX18 
100/90HX18
$61 
$64
exact 
excel
Road Winner RW-010 110/90HX18 $67 excel
Kenda K657 Sport Challenger 100/90H-18 $45 excel K657 Sport Challenger 110/90H-18 
100/90H-18
$50 
$45
excel 
exact
Metzeler ME-33 Laser 90/90H-18
100/90H-18
$75
 - 
exact
excel
ME-99A Perfect 110/90H-18 excel
Michelin Macadam 50 90/90H-18 
100/90H-18
100/90V-18
$92 
$94
$101
exact 
excel
excel
Macadam 50 110/90H-18 $100 excel
Pirelli Strada MT69E 90/90H-18 
100/90H-18
$76 
$74
exact 
excel
Strada MT68E 110/90H-18 $80 excel

Listing by Manufacturer

Avon

Front size MAW match Rear size MAW match
Roadrunner AM20 90/90H-18 $96 exact Roadrunner AM21 100/90H-18 $98 exact
Roadrunner AM20 100/90H-18 $97 excel Roadrunner AM21 110/90H-18 $114 excel
Super Venom AM20  100/90V-18 $102 excel Super Venom AM18 110/90V-18 $107 excel

Bridgestone

Front size MAW match Rear size MAW match
BT17 Sports Mileage 100/90V-18 $90 excel BT17 Sports Mileage 120/90V-18 $104 wide
BT35 Sports Mileage 90/90H-18 exact
BT35 Sports Mileage 100/90H-18 $93 excel BT35 Sports Mileage 110/90H-18 $106 excel
BT45 Sports Mileage 90/90H-18 $70 exact
BT45 Sports Mileage 100/90H-18 $72 excel BT45 Sports Mileage 110/90H-18 $92 excel
BT45 Sports Mileage 100/90V-18 $68 excel
BT53 Sports Touring 100/90VR18 excel
SE11 100/90H-18 $74 excel SE11 110/90H-18 $80 excel

Continental

Front size MAW match Rear size MAW match
Blitz TKH-24 120/90H-18 $58 wide
Tour TK-17 120/90H-18 $80 wide

Dunlop

Front size MAW match Rear size MAW match
F11 100/90H-18 $71 excel K627 110/90H-18 $74 excel
K491 Elite II Touring 100/90H-18 $62 excel K491 Elite II Touring 110/90HB18 $69 excel
K591 Sport Touring 100/90V-18 $65 excel K591 Sport Touring 110/90V-18 $63 excel

IRC

Front size MAW match Rear size MAW match
Durotour RS-310 90/90H-18 $49 exact Durotour RS-310 110/90H-18 $50 excel
Durotour RS-310 100/90H-18 $48 excel
Road Winner RW-010 90/90HX18 $61 exact
Road Winner RW-010 100/90HX18 $64 excel Road Winner RW-010 110/90HX18 $67 excel

Kenda

Front size MAW match Rear size MAW match
K657 Sport Challenger 100/90H-18 $45 excel K657 Sport Challenger 110/90H-18 $50 excel
K657 Sport Challenger 100/90H-18 $45 exact

Metzeler

Front size MAW match Rear size MAW match
ME-33 Laser 90/90H-18 $75 exact ME-99A Perfect 110/90H-18 excel
ME-33 Laser 100/90H-18 excel
ME-33 Laser 100/90V-18 $83 excel
ME-77 100/90H-18 $72 excel ME-77 120/90H-18 $87 wide
ME-88 Marathon 100/90H-18 $78 excel
ME-Z4 110/80ZR18 $112 wide

Michelin

Front size MAW match Rear size MAW match
Macadam 50 90/90H-18 $92 exact
Macadam 50 100/90H-18 $94 excel Macadam 50 110/90H-18 $100 excel
Macadam 50 100/90V-18 $101 excel
Tarmac 100/90H-18 excel
Tarmac (old) 100/90H-18 $101 excel

Pirelli

Front size MAW match Rear size MAW match
MT75 90/90H-18 exact MT75 110/80H-18 short
Match MT09  100/90V-18 $94 excel Match MT08 120/90V-18 $116 wide
Phantom MT29 100/90V-18 excel Phantom MT28 120/90V-18 wide
Strada MT69E 90/90H-18 $76 exact
Strada MT69E 100/90H-18 $74 excel Strada MT68E 110/90H-18 $80 excel

Key:

Exact Precisely matches original spec
Excellent Precisely matches a recommended alternate
Good An exact or alternate in a different sizing system
Short Exact or excellent width, lower profile.  Consider these both ends to lower the bike
Soft Similar diameter by using a taller profile and narrower width; used on the rear only
Tall Taller profile, stock width; similar in effect to "soft", but for the front only
Wide Same profile, wider tyre.  This MAY NOT FIT your rim.  BE CAREFUL!!!